The research team, led by Ayşe Gül Filik and corresponding author Gökhan Filik of the university’s Agricultural Biotechnology Department, together with Olgay Kaan Tekin, set out to answer a question that has become increasingly urgent in modern animal science: can native plant resources rich in bioactive compounds serve as effective, natural alternatives to synthetic feed additives? Consumer pressure for so-called clean label animal products, combined with rising feed costs and concerns over chemical residues, has pushed researchers worldwide to screen local flora for phytogenic additives — plant-derived compounds that might improve animal health and product quality without pharmaceutical inputs. Viburnum opulus, which grows wild across Europe, North Africa, northern Asia, and particularly in the Turkish provinces of Kayseri, Sivas, Tokat, Kırşehir, and Ankara, presented an attractive candidate because of its unusually dense phytochemical profile.

That profile is what makes the fruit scientifically compelling. Analyses of Viburnum opulus berries have revealed high concentrations of polyphenols, flavonoids, tannins, carotenoids, and vitamin C. The dominant phenolic compound is chlorogenic acid, which can account for between 54 and 96 percent of the fruit’s total phenolic content and is regarded as a powerful antioxidant and antimicrobial agent. The fruit is also rich in organic acids, particularly malic and quinic acids, and contains notable concentrations of free amino acids such as aspartic and glutamic acid. Previous laboratory and pharmacological studies have linked Viburnum opulus extracts to lipid metabolism regulation, reductions in free fatty acids, cholesterol homeostasis effects, and even anticancer and antidiabetic activity, but almost none of this work had examined the plant as a direct dietary supplement in poultry. The Turkish team’s experiment was designed to fill that gap with a dose-response approach.

The trial involved 176 laying Japanese quails aged 30 weeks, a species favored in poultry nutrition research for its short generation interval and high egg production capacity. The birds — 132 females and 44 males — were randomly allocated into four dietary treatment groups, each with 11 replicate cages containing three females and one male. The cage, not the individual bird, served as the experimental unit for all performance and production measurements, a design choice that guards against pseudo-replication in statistical analysis. The control group received a standard basal diet formulated to meet quail nutritional requirements with 177 grams per kilogram of crude protein and 2800 kilocalories per kilogram of metabolizable energy. The three treatment groups received the same basal diet supplemented with Viburnum opulus fruit powder, abbreviated VOFP, at inclusion levels of 5, 10, and 15 grams per kilogram of feed. The fruit itself was harvested at full maturity from the university’s research fields, air-dried for a week, finished in a ventilated oven at 65 degrees Celsius for 48 hours, and ground through a one-millimeter sieve in an ultra-centrifuge mill to ensure homogeneous mixing. The feeding experiment ran for eight weeks under a 16:8 light-dark photoperiod with feed and water available ad libitum.

Over the 56-day trial, the researchers tracked body weight, body weight gain, feed intake, and feed conversion ratio weekly, collected eggs twice daily, and subjected eggs gathered on the third day of each week to a battery of quality analyses. External parameters included egg weight, dimensions measured with digital calipers, shape index, shell thickness at three points along the shell, and breaking resistance determined with a texture analyzer. Internal quality was assessed through albumen and yolk heights, albumen and yolk indices, and the Haugh unit, the internationally recognized standard for egg interior quality. Yolk color was quantified spectrophotometrically using CIELAB parameters. Critically, the team also monitored cholesterol metabolism by analyzing yolk cholesterol concentrations at the start of the trial and during weeks two, four, six, and eight, using a spectrophotometric extraction method adapted from earlier phytogenic additive research. Data were analyzed with general linear models, and orthogonal polynomial contrasts were applied to detect dose-response relationships across the supplementation levels.

The headline finding on performance was reassuring: dietary VOFP supplementation produced no statistically significant adverse effects on body weight, body weight gain, or feed conversion ratio, indicating that the birds tolerated even the highest inclusion level well. There were, however, subtle shifts in feeding behavior. Total feed intake was highest in the 5 gram per kilogram group at 7888.0 grams, while the 15 gram per kilogram group consumed the least at 7115.6 grams, a statistically significant difference. The authors suggest this reduction at the highest dose may reflect the fruit’s acidic profile — its abundant malic and quinic acids may slightly inhibit palatability — though the free amino acids in the fruit could simultaneously support protein metabolism. Egg production itself was statistically unchanged across groups, but the 5 gram per kilogram group achieved the highest total egg weight at 1828.60 grams and produced notably more afternoon-laid eggs than the control and highest-dose groups.

The most striking results emerged in egg internal quality. Supplementation at 5 grams per kilogram significantly increased egg yolk height, which reached 13.55 millimeters, and elevated the yolk index compared with controls, both indicators of a richer, more standing yolk. Albumen weight and albumen index were also highest at this dose. Among yolk color parameters, the b* value, which reflects yellowness, peaked at 19.74 in the 10 gram per kilogram group — an attribute with real market value, since consumers associate deeper yolk color with superior eggs. Shell characteristics told a more nuanced story: shell weight decreased with supplementation, reaching its lowest value of 1.22 grams in the 5 gram per kilogram group, yet shell thickness and breaking resistance were unaffected, suggesting that mineral metabolism and structural integrity were preserved even as shell mass shifted. The Haugh unit remained statistically unchanged across all treatments.

The cholesterol results are the most tantalizing and the most cautiously framed. Across the trial, average yolk cholesterol concentrations declined numerically in all supplemented groups, but statistical significance appeared only once: in the sixth week, when cholesterol in the 15 gram per kilogram group fell to 41.04 milligrams per gram of yolk, down from 52.31 milligrams per gram in the control group. The authors interpret this as a potential time-dependent effect of the fruit powder on cholesterol metabolism, plausibly connected to the phenolic compounds that earlier cell studies have linked to lipid accumulation and fatty acid metabolism pathways. Yet they are careful to note that the specific phytochemical composition of the powder used in this trial was not characterized, so the mechanism remains hypothetical rather than confirmed. The transient nature of the effect — significant in week six but not sustained across the full eight weeks — underscores how much remains unknown about how plant bioactives interact with avian physiology over time.

What the study ultimately delivers is preliminary but valuable evidence that Viburnum opulus fruit powder is a viable, well-tolerated phytogenic feed additive for laying quails, with the low dose improving selected internal egg quality traits and the high dose showing a potential, if inconsistent, cholesterol-modulating effect. The researchers call for follow-up work incorporating phytochemical characterization, hepatic cholesterol metabolism markers, antioxidant status measurements, and gut microbiota analyses to pin down the mechanisms at play. They also point to food science findings showing that encapsulation can stabilize the fruit’s bioactive compounds, hinting at strategies to enhance and prolong its effects in feed. For a fruit long celebrated in Anatolian folk tradition and now attracting attention in pharmacology laboratories worldwide, the journey from village juice press to scientific feed supplement is still at its beginning — but these quail eggs offer an early, measurable sign that the berry’s bioactive promise may extend from human health into the food chain itself.

Subject of Research: Effects of dietary Viburnum opulus fruit powder supplementation on performance, egg quality, and yolk cholesterol in laying Japanese quails

Article Title: The effects of Viburnum opulus L. fruit powder on the performance, egg traits, and egg cholesterol of laying Japanese quails

Article References: Filik, A. G., Filik, G., & Tekin, O. K. (2026). The effects of Viburnum opulus L. fruit powder on the performance, egg traits, and egg cholesterol of laying Japanese quails. Archives Animal Breeding, 69(3), 507-515. https://doi.org/10.5194/aab-69-507-2026

Image Credits: AI Generated

DOI: 10.5194/aab-69-507-2026

Keywords: Viburnum opulus, Japanese quail, phytogenic feed additive, egg quality, egg yolk cholesterol, poultry nutrition, chlorogenic acid, clean label, feed conversion ratio, Haugh unit, Anatolia, animal science

The scale of the underlying analysis is considerable. The authors screened roughly 1,100 records from major scientific databases including Scopus, Web of Science, PubMed, ScienceDirect, and Google Scholar. After removing duplicates and screening titles and abstracts, 530 studies remained for closer inspection, and 430 underwent full-text assessment against predefined eligibility criteria. The final synthesis drew on 183 studies, spanning molecular mechanisms, physicochemical properties, and industrial applications of both natural and synthetic gelling and foaming agents. This systematic approach matters because knowledge about gelation and foaming has long been scattered across different food systems, from confectionery to dairy to beverages, limiting the development of a unified understanding.

At the molecular level, gelation is a story of networks. A gel forms when dissolved biopolymers assemble into a three-dimensional mesh that traps water and other components, producing the firmness, elasticity, and mouthfeel consumers recognize in jellies, desserts, and confectionery. The review details how different agents achieve this through distinct mechanisms. High-methoxyl pectin, the classic jam-setting polysaccharide, requires an acidic environment around pH 2.5 to 3.5 and high sugar concentrations of 55 to 75 percent. The acid reduces electrostatic repulsion between negatively charged pectin molecules, while sugar binds available water, allowing hydrogen bonds and hydrophobic interactions between methyl ester groups to stabilize junction zones into a thermoreversible network.

Low-methoxyl pectins and alginates take a different route entirely: ionic cross-linking. Alginate, extracted from brown seaweed, gels in the presence of calcium ions through the well-known egg-box model, in which divalent cations nest between the guluronate regions of adjacent polymer chains. This chemistry powers the spherification technique beloved of molecular gastronomy, where an alginate-containing liquid dropped into a calcium chloride solution instantly forms a thin, flexible membrane around each droplet, producing caviar-like spheres. Carrageenans from red seaweed follow yet another path, undergoing a coil-to-helix transition upon cooling before metal ions such as potassium and calcium aggregate the helices into networks. The ion type dictates texture: potassium yields firm, brittle gels with kappa-carrageenan, while calcium produces softer, more elastic structures with the iota form.

Agar demonstrates perhaps the most dramatic thermal behavior of any hydrocolloid. When heated above 85 to 95 degrees Celsius, agarose chains float as random coils; on cooling to between 32 and 45 degrees, they align into ordered double helices stabilized by hydrogen bonds, which then aggregate into a rigid three-dimensional network. The large gap between setting and melting temperatures gives agar gels exceptional thermal stability, remaining solid at room temperature and beyond. This hysteresis, combined with high clarity and low syneresis, explains why roughly 90 percent of extracted agar serves as a gelling agent in meat and fish products and as a texture enhancer in dairy, and why it has become the gelatin substitute of choice for vegetarian and vegan formulations.

Gelatin, the workhorse of confectionery, operates through temperature-induced protein assembly. Derived from the hydrolytic degradation of collagen, it consists largely of glycine, proline, and hydroxyproline, organized into alpha, beta, and gamma polypeptide chains. Dissolved in hot water, its triple-helix structure unwinds into individual strands; as the solution cools, these strands re-form hydrogen bonds and hydrophobic interactions, weaving a mesh that traps water and sets into the familiar semi-solid. Beyond desserts, gelatin retains juices in canned meats, stabilizes marshmallows and gummy candies, and even serves as an edible film material, though its animal origin increasingly conflicts with consumer demand for plant-based alternatives.

Foaming, the review’s second focus, is governed by a different physical principle: the stabilization of gas bubbles within a liquid or semisolid matrix. Proteins act as natural foaming agents because they are amphiphilic, carrying both hydrophilic and hydrophobic regions. When egg whites are beaten, proteins such as ovalbumin and ovotransferrin unfold and realign at the air-water interface, forming a thin elastic film that encapsulates air and lowers surface tension. Surfactants like soy lecithin and monoglycerides perform the same job more efficiently, aligning at the interface to prevent bubble coalescence. In whipped cream, partially coalescing fat globules form a network that locks air bubbles in place, reinforced by a secondary protein layer, producing the smooth, creamy texture essential to consumer satisfaction.

The practical stakes of foam stability extend across the entire food landscape. In bakery, angel food and chiffon cakes depend on egg-white foams that expand during baking, with cream of tartar added to lower the pH and enhance stability. In beverages, the head on beer and the microfoam on a cappuccino both rely on surface-active proteins forming resilient layers around bubbles. In gluten-free baking, where the gluten network is absent, methylcellulose and egg whites provide the aeration and structure needed for a light crumb. Even fats can sabotage the process: oils disrupt the films around air bubbles, forcing formulators to adjust ingredient proportions and processing techniques carefully.

The review also spotlights emerging alternatives driven by the clean-label movement. Aquafaba, the cooking water from chickpeas and other legumes, contains proteins, polysaccharides, and saponins that give it foaming capacity and stability comparable to egg whites in certain applications, making it attractive for vegan and allergen-free formulations. Xanthan gum, produced by bacterial fermentation, remains stable across a remarkable pH range of 2.0 to 12.0 and in high-salt environments, excelling as a foam stabilizer and suspension agent. Yet natural ingredients bring their own problems: batch-to-batch variability in composition, molecular weight, and purity, driven by species, harvest season, and extraction method, can shift gel strength and viscosity unpredictably, complicating industrial standardization.

The authors conclude that the future lies in hybrid systems and advanced processing. Combining polysaccharides with plant proteins may deliver enhanced stability, resistance to thermal degradation, and reduced syneresis in clean-label formulations, while technologies such as high-intensity ultrasound, cold plasma, and high-pressure processing offer ways to tailor the interfacial behavior and rheological properties of non-animal biopolymers to match conventional agents. Ion-induced gelation with gellan gum under high pressure, which sets cold-set desserts without heating, hints at how processing innovation can preserve temperature-sensitive ingredients. Bridging fundamental knowledge of macromolecular interactions with industrial-scale application, the review argues, will be essential for building the next generation of stable, sustainable, and sensory-optimized foods, ensuring that the invisible chemistry inside every jelly and foam keeps pace with what consumers expect on the label.

Subject of Research: Mechanisms and applications of gelling and foaming agents in food systems

Article Title: Review on Gelling and Foaming Agents in Food: Mechanism and Applications

Article References: Kassa, M. G., Teferi, D. A., Satheesh, N., & Asemu, A. M. (2026). Review on Gelling and Foaming Agents in Food: Mechanism and Applications. Food Science & Nutrition, 14(10), Article e72437. https://doi.org/10.1002/fsn3.72437

Image Credits: AI Generated

DOI: 10.1002/fsn3.72437

Keywords: gelling agents, foaming agents, hydrocolloids, pectin, gelatin, agar, carrageenan, alginate, aquafaba, food texture, clean label, plant-based proteins

The research team, led by Nadini H. Gamage and Amilton S. de Mello, manufactured thirty-two smoked hams at a USDA-inspected commercial facility using four different brine formulations. The first was a conventional recipe built on synthetic sodium nitrite. The second replaced the synthetic compound with celery powder and added a buffered vinegar antimicrobial called MOstatin V. The third combined celery powder with spices, and the fourth contained no nitrite source at all, relying instead on spices, red wine, and annatto paste to simulate the appearance and flavor of a cured product. Each batch of hams was then split in two: half of the slices were subjected to high-pressure processing at 85,000 psi, roughly 586 megapascals, for two minutes at 5 degrees Celsius, while the other half remained untreated.

The choice of high-pressure processing was no accident. Ready-to-eat meats, despite being fully cooked, remain vulnerable to contamination after processing, most notably by Listeria monocytogenes, a pathogen of serious public health concern. United States regulations under 9 C.F.R. 430.4 require post-lethality treatments to suppress this organism, and high-pressure processing has emerged as one of the most effective options for sliced cured hams. The catch is that earlier studies suggested the treatment could alter texture, tenderness, color, and lipid stability, raising the question of whether the safety benefit comes at a sensory cost.

To answer that question, the researchers tracked the hams through twenty-nine days of refrigerated vacuum display, measuring lightness, redness, yellowness, hue angle, and chroma with a calibrated colorimeter on eight separate days. They also ran texture profile analysis and Warner-Bratzler shear force tests, determined moisture content following AOAC protocols, and recruited 240 consumer panelists across eight sensory sessions, each participant scoring color, odor, flavor, texture, and overall desirability on nine-point hedonic scales. The statistical design was a completely randomized 4 by 2 factorial, with curing treatment as the whole-plot factor and pressure treatment as the split-plot factor, analyzed in SAS using the GLIMMIX procedure.

The chemistry behind the characteristic pink of cured meat explains much of what the team found. During curing, nitric oxide reacts with myoglobin to form nitrosylmyoglobin, which is converted upon heating into nitrosyl hemochromogen, a heat-stable pigment built around a porphyrin ring with a central ferrous iron bound to nitric oxide. This molecule proved remarkably robust under pressure. Hams cured with either synthetic nitrite or celery powder showed comparable color stability, and the pressure treatment had no significant effect on redness at all. Only small shifts in yellowness and hue angle appeared late in the display period among pressurized samples, with a maximum difference of 0.36 in a* and 1.94 in hue angle, changes far too subtle for the human eye to detect under retail lighting.

The uncured hams told a different story. Without nitrite, the annatto paste and red wine added to the brine simply could not reproduce the rosy pink of genuine curing. Annatto’s carotenoid pigments produce orange-yellow to brick-red tones that fade in light, while the anthocyanins in red wine appear to have oxidized during the ten-hour smoking cycle at 108 degrees Celsius. Neither pigment can mimic the specific cool pink generated by the nitrogen-iron bond at the heart of nitrosyl hemochromogen. Instrumental measurements confirmed it: the uncured hams showed the lowest redness values and the highest yellowness, hue angle, and chroma, and panelists rated their color the least desirable of all four treatments.

Texture results reinforced nitrite’s functional necessity. The uncured hams recovered their shape less effectively after compression, showing reduced springiness compared with the conventional and spiced celery-powder hams. The researchers hypothesize that lower sodium chloride levels in the uncured formulation reduced salt-mediated protein solubilization, leaving muscle fibers more swollen and water-laden. Notably, moisture content itself did not differ among treatments, hovering around 63 to 65 percent, which suggests other brine ingredients contributed to the textural deficit. High-pressure processing, meanwhile, produced only one measurable textural change, a slight reduction in deformation, and left hardness, shear force, chewiness, and cohesiveness untouched. The authors attribute this resilience to the fact that the hams were already cooked: their proteins were thermally denatured before pressurization and did not undergo further transformation during the brief two-minute treatment.

The sensory panel delivered the most commercially significant verdict. Hams cured with synthetic nitrite and those cured with celery powder plus the buffered vinegar antimicrobial received the highest flavor and overall desirability scores, and they were statistically indistinguishable from each other. Panelists clearly preferred the traditional cured flavor profile over the seasoned alternatives, and the spiced formulations of both the celery-powder and uncured hams scored lower on flavor, odor, and overall appeal. The equivalence of the two nitrite-cured products indicates that the source of the nitrite, whether synthesized in a factory or extracted from celery, leads to the same flavor and color development during processing.

One interaction between curing source and pressure treatment stood out. In the celery-powder hams containing the buffered vinegar antimicrobial, high-pressure processing actually reduced off-flavor intensity, consistent with earlier work showing that buffered vinegar improves flavor perception in restructured beef. In the uncured hams, however, pressure treatment increased off-flavor intensity. The researchers point to lipid oxidation as the likely culprit: pressures above 400 megapascals are known to markedly accelerate lipid oxidation in uncured pork, while nitrite protects against oxidation by stabilizing heme iron and preventing the release of catalytic pro-oxidants. Vacuum packaging, which removes oxygen before storage, appears to have shielded the nitrite-cured hams from this effect entirely.

The study’s conclusions cut in two directions. For manufacturers, the message is reassuring: naturally sourced nitrite performs equivalently to synthetic nitrite in maintaining quality, and high-pressure processing does not compromise the attributes of nitrite-cured ready-to-eat hams. For regulators, the findings sharpen an existing dilemma. Because the USDA does not recognize celery powder as an equivalent curing agent, products made with it can be labeled “uncured” even though the ingredient functions as nitrite once converted. The authors argue that this labeling convention deserves reconsideration, noting that the similarity between naturally and synthetically cured products in their study supports regulatory recognition of naturally cured hams. They also acknowledge the study’s limits: lipid oxidation and residual nitrite were not directly measured, and future work should examine how different nitrite sources interact with pressure treatment to affect food safety indicators, including Listeria contamination. Until then, the humble slice of deli ham remains a surprisingly rich case study in how chemistry, consumer perception, and labeling law collide on the supermarket shelf.

Subject of Research: Effects of natural versus synthetic nitrite curing sources and high-pressure processing on the quality of smoked ready-to-eat hams

Article Title: Effects of curing sources and high-pressure processing on quality attributes of smoked hams

Article References: Gamage, N. H., Ewasko, D., Yeh, Y., & de Mello, A. S. (2026). Effects of curing sources and high-pressure processing on quality attributes of smoked hams. Food Science of Animal Resources, 46(1), Article 63. https://doi.org/10.1007/s44463-026-00063-y

Image Credits: AI Generated

DOI: 10.1007/s44463-026-00063-y

Keywords: nitrite, celery powder, high-pressure processing, smoked ham, clean label, meat science, Listeria monocytogenes, lipid oxidation, sensory evaluation, cured color, ready-to-eat meat, food regulation

The chemistry behind phosphate functionality is more intricate than most shoppers would ever suspect. Food-grade phosphates are derived from rock phosphorus, which is converted into phosphoric acid, purified to food grade, and neutralized with strong alkali before being melted and polymerized. Only about one percent of the world’s phosphoric acid ends up in food and beverages; the vast majority goes into fertilizer. The resulting phosphate salts fall into structural families, including ring, linear, and combined forms, and their behavior in meat depends heavily on chain length. Short-chain pyrophosphates excel at dissociating actomyosin and extracting myofibrillar proteins, which is critical for water retention and emulsion formation in comminuted products. Longer-chain tripolyphosphates and polyphosphates, by contrast, offer superior cold-water solubility and metal-ion sequestration, making them better suited for brine systems where they help control warmed-over flavor and discoloration. Monophosphates buffer well but bind calcium poorly and dissolve reluctantly in cold water, which is why manufacturers typically blend phosphate types to balance buffering behavior, brine stability, extraction efficiency, and oxidative control.

These structural differences translate directly into product quality. Phosphates influence meat color by reducing surface light scattering from moisture exudation and by shifting the equilibrium among myoglobin forms, the pigments responsible for the red, purple, and brown hues of muscle tissue. Studies on Spanish-style chorizo showed that phosphate addition altered lightness and yellowness values while changing moisture dynamics during drying. In emulsion-type sausages stored for thirty days at refrigeration temperatures, phosphate inclusion stabilized hardness and reduced purge loss, while higher phosphate levels increased emulsion stability and cooking yield. Texture effects extend to whole-muscle products as well: phosphate-enhanced chicken breast and beef showed improved tenderness, with shear force responding significantly to salt concentration. Interestingly, the review notes that phosphate addition is not universally beneficial, as sous-vide cooked lamb loins with high moisture content and phosphate actually exhibited increased hardness and shear force, likely because swollen tissue and excessive protein denaturation demanded greater compression forces.

Flavor presents a subtler picture. At recommended addition levels of 0.3 to 0.5 percent, phosphates generally leave flavor perception largely unchanged, though certain types can impart bitterness or an alkaline, soapy aftertaste at higher concentrations. Tetrapotassium pyrophosphate scored lower on flavor in goat meat studies than tetrasodium pyrophosphate. More importantly, phosphates protect flavor indirectly by sequestering the metal ions that drive lipid oxidation, thereby suppressing warmed-over flavor and other storage-related off-notes in cooked, refrigerated meats. Consumer studies of enhanced Australian beef fajitas found that phosphate-treated samples earned higher flavor and overall liking scores, an effect the researchers attributed to the strong correlation between juiciness and perceived flavor intensity. In this sense, phosphates act less as flavorings and more as guardians of the flavor that meat naturally possesses.

The health case for reduction rests on a crucial biochemical distinction. Phosphorus is an essential mineral, with roughly 85 percent of the body’s supply stored in bones and teeth, and homeostasis is tightly regulated by the kidneys, intestine, parathyroid hormone, fibroblast growth factor-23, and vitamin D. But the inorganic phosphates added to processed foods behave very differently from the organic phosphorus bound in meat and dairy. Inorganic phosphate additives exhibit approximately 90 to 100 percent bioavailability, producing rapid intestinal absorption and elevated serum phosphate levels. High dietary phosphate intake has been associated with disturbed mineral metabolism, particularly in people with chronic kidney disease, and elevated serum phosphate may stimulate secretion of parathyroid hormone and FGF-23, promoting altered calcium metabolism, vascular calcification, bone demineralization, and increased cardiovascular risk. Epidemiological analyses have even linked high serum phosphate to cardiovascular mortality within the upper normal physiological range. Emerging evidence also suggests excessive phosphate may perturb gut microbiota composition and intestinal barrier function, though the authors caution that this area requires further investigation.

Regulatory frameworks reflect this ambivalence. The U.S. Food and Drug Administration classifies phosphate food additives as generally recognized as safe when used according to good manufacturing practices, though specific applications in meat products carry quantity limits. European legislation permits phosphates in meat preparations, minced meat, and processed meat products but prohibits them in fresh meat, capping the permitted maximum at 5 grams per kilogram expressed as phosphorus pentoxide in the finished product. The Joint FAO/WHO Expert Committee on Food Additives has set a maximum tolerable daily intake of 70 milligrams of phosphorus per kilogram of body weight, based on the lowest dose that caused nephrocalcinosis in rats. Estimated daily phosphorus intakes across European Union populations, ranging from about 265 milligrams per day in infants to roughly 1,767 milligrams in adults, currently fall within tolerable limits, but the cumulative contribution of processed foods to long-term exposure remains a genuine public health concern.

So what can replace a molecule that simultaneously adjusts pH, extracts protein, binds water, stabilizes emulsions, and chelates prooxidants? The review’s central conclusion is sobering: no single ingredient fully replicates the multifunctional portfolio of phosphates. Dietary fibers from citrus, wheat, bamboo, and oats bind water effectively through their porous structures and hydrophilic functional groups, and citrus fiber has partially replaced sodium phosphate in emulsified bologna while maintaining acceptable cooking yield and texture. Native and modified starches improve water retention and viscosity, with pregelatinized and resistant starches enhancing gel formation and reducing purge loss, though starch does little for myofibrillar protein extraction. Proteins from milk, blood plasma, soy, and peas stabilize emulsions through interfacial activity and gelation, compensating for reduced phosphate-induced protein solubilization, though allergen labeling and flavor consequences must be weighed. Alkaline salts such as sodium bicarbonate mimic the pH-shifting effect, and studies on enhanced beef showed bicarbonate improved tenderness and juiciness, but overuse risks soapy flavors and excessive alkalinity. Transglutaminase, the enzyme that cross-links proteins covalently, strengthens gel structure without directly raising water-holding capacity.

Processing technologies offer a complementary path. High-pressure processing at moderate levels of 100 to 300 megapascals unfolds muscle proteins and enhances gelation and water binding without any additives, though the capital cost of pressure equipment remains a barrier for smaller plants. Ultrasound generates cavitation that improves mass transfer and myofibrillar protein extraction, boosting the functionality of low-phosphate systems. Vacuum tumbling optimizes brine penetration and protein extraction, potentially allowing reduced phosphate levels when salt concentration and temperature are carefully controlled. Adjusting sodium chloride levels and ionic strength can partially compensate for missing phosphate by enhancing protein solubilization, although sodium reduction targets complicate that lever. The most promising industrial strategy, the authors argue, is a hurdle-based approach that combines multifunctional ingredients with optimized processing, pairing affordable technologies like vacuum tumbling with fiber, starch, or protein systems so that small-scale manufacturers are not locked out by expensive equipment.

The bottom line from the Korean research team, supported by the Korea Food Research Institute, is that strategic phosphate reduction is technologically achievable but demands product-specific reformulation rather than one-to-one substitution. Partial replacement is generally more feasible than complete elimination, particularly in emulsified meat systems where phosphate functionality is most deeply embedded. Future research, the review concludes, should focus on elucidating the fundamental mechanisms of protein-water interactions, developing clean-label multifunctional ingredient systems, validating long-term storage quality and sensory performance, and aligning reformulation efforts with evolving regulations. As consumers increasingly scrutinize ingredient lists and sustainability pressures mount on finite phosphate reserves, the humble sausage may soon owe its juiciness to citrus fiber, high pressure, and clever engineering rather than a sprinkle of sodium tripolyphosphate, a shift that would reshape one of the food industry’s oldest chemical partnerships.

Subject of Research: Strategies for reducing and replacing phosphate additives in processed meat products

Article Title: Strategies for replacing phosphates in meat processing

Article References: Kim, T.-K., Lee, M. H., Shin, D.-M., Kim, Y.-J., Jung, S., & Choi, Y.-S. (2026). Strategies for replacing phosphates in meat processing. Food Science of Animal Resources, 46(1), Article 65. https://doi.org/10.1007/s44463-026-00069-6

Image Credits: AI Generated

DOI: 10.1007/s44463-026-00069-6

Keywords: phosphates, meat processing, clean label, water-holding capacity, phosphate substitutes, food additives, emulsified meat products, high-pressure processing, dietary fiber, transglutaminase, food safety, sustainability

Salecan is not an ordinary hydrocolloid. Produced by microbial fermentation, it was approved as a novel food additive by the U.S. FDA in 2020 and by China’s National Health Commission in 2021. Structurally, it is a linear, unbranched glucan built from a repeating unit of seven beta-1,3-linked and two alpha-1,3-linked glucose residues, with purity exceeding 90 percent. That linearity matters enormously. Most familiar anionic polysaccharides, from xanthan gum to carrageenan and pectin, carry highly branched backbones and heterogeneous branch distributions, features that create steric hindrance and thermodynamic incompatibility with starch chains. Salecan’s naked backbone can align and entangle directly with starch molecules, while its uniformly distributed carboxyl groups from succinyl and pyruvyl substituents provide consistent negative charge across the entire chain. As a fermentation product, it is also immune to the seasonal and geographic constraints that complicate plant- and seaweed-derived gums.

To test whether Salecan’s behavior depends on starch structure, the research team led by Wanping Xiong and Xianggui Chen at Sichuan University paired two starches that sit at opposite ends of the botanical spectrum. Potato starch, a tuber starch, features large oval granules of 15 to 100 micrometers, negatively charged monophosphate ester groups on its molecular chains, a B-type crystalline pattern and a highly cross-linked granular architecture. Corn starch, the cereal archetype, presents small polygonal granules of 5 to 20 micrometers, a nearly neutral surface, an A-type crystalline pattern and a substantially higher amylose content of 25 to 28 percent with a lower degree of polymerization. Every major structural determinant of polysaccharide-starch interaction therefore differs between the pair, making it an ideal contrast model.

The divergent results began immediately. When Salecan was added at concentrations from 0.5 to 2 percent by starch dry weight, both starches showed delayed gelatinization, with pasting curves shifted to the right and peak times significantly prolonged, findings confirmed by differential scanning calorimetry. But the viscosity story split cleanly along charge lines. In potato starch, Salecan dramatically reduced peak, trough and final viscosity, and at 2 percent addition the consistency coefficient fell by 81.56 percent. The authors attribute this to electrostatic repulsion between the negatively charged potato starch and the anionic polysaccharide, which confines Salecan to the granule surface as a barrier that blocks water ingress and amylopectin leaching. Corn starch behaved in the opposite way: Salecan increased its peak viscosity, breakdown strength and final viscosity, with the consistency coefficient surging by 332.9 percent at 2 percent addition, because the neutral granules allowed Salecan to disperse through the paste and leached amylose supplied abundant hydroxyl groups for hydrogen bonding and chain entanglement.

Rheological measurements reinforced the split. All composite pastes displayed shear-thinning pseudoplastic behavior, but Salecan reduced the apparent viscosity and shear stress of potato starch systems while raising those of corn starch. Frequency sweep tests showed that Salecan depressed the storage and loss moduli of potato gels yet elevated the moduli of corn gels in a concentration-dependent fashion. For food engineers, this duality is a gift. High-viscosity tuber pastes used in sauces, custards and dessert gels become easier to pump and process without sacrificing final gel integrity, while cereal-based soups, gravies and bakery fillings gain viscosity and thermal stability exactly where hot filling and cooling demand them.

The second half of the study tackled retrogradation, the costlier enemy of shelf life, and here Salecan proved a unifying remedy. Storing gels at 4 degrees Celsius for up to 21 days, the researchers tracked gel hardness with texture analysis, water mobility with low-field nuclear magnetic resonance, crystallinity with X-ray diffraction, molecular order with Fourier transform infrared spectroscopy and microstructure with scanning electron microscopy. Every technique converged on the same conclusion: at 1 percent addition, Salecan significantly slowed the aging of both starches, cutting gel hardness by 33.63 percent for potato starch and 31.19 percent for corn starch relative to controls.

The water-migration data are particularly striking. During storage, bound water progressively escapes the starch matrix and becomes free water, a process that culminates in syneresis, the unappetizing pooling of liquid that ruins chilled desserts and fillings. Free water appeared in plain corn starch gel after only three days and in potato starch gel after fourteen days. At 1 percent Salecan, the free water fraction after 21 days fell from 3.75 percent to 0.54 percent in potato gels and from 15.81 percent to 6.31 percent in corn gels. X-ray diffraction showed that Salecan did not change the crystal type formed during aging but significantly lowered relative crystallinity, while infrared ratios revealed suppressed short-range molecular order and reduced double-helix formation at the same optimal dosage. Interestingly, both hardness and structural indices followed a U-shaped dose curve, first falling and then rebounding at high concentrations, because Salecan’s intense water-holding capacity ultimately concentrates amylose in the remaining solvent and promotes renewed association.

The proposed mechanism weaves these observations together. During short-term retrogradation, Salecan’s linear backbone entangles with amylose and sterically blocks chain re-association, delaying initial network formation. During long-term storage, it disrupts the hydrogen-bond reformation needed for double-helix nucleation, impedes the ordered alignment of amylopectin side chains, and physically retains water within the gel network. Scanning electron microscopy captured the microstructural fingerprints of these effects: Salecan produced smaller, more orderly pores and tighter matrix interconnection in potato gels, while in corn gels it preserved a smoother, looser honeycomb structure by resisting the dehydration shrinkage that normally crumples high-amylose networks. No new covalent bonds were detected, confirming that the interactions are dominated by hydrogen bonding and physical entanglement.

Perhaps the most surprising results came from simulated digestion. Freshly gelatinized starch with Salecan was hydrolyzed more slowly by alpha-amylase and amyloglucosidase, because the additive suppresses complete gelatinization and its dense composite network shields enzyme binding sites on starch molecules, a finding that points toward low-glycemic-index versions of instant porridges, steamed rice alternatives and gluten-free breads. Yet after seven days of retrogradation, the pattern inverted: Salecan-containing gels were digested faster than highly crystallized plain retrograded gels, precisely because Salecan had prevented the formation of enzyme-resistant crystalline domains. That inversion doubles as independent mechanistic evidence, confirming from a nutritional angle that Salecan suppresses resistant crystal formation during aging. The authors caution that their structural-dependence conclusions rest on just two contrasting starches, and that broader starch panels will be needed to validate generality. Still, the prospect of a single clean-label, fermentation-produced ingredient that simultaneously tames viscosity where it runs too high, boosts it where it falls short, prevents staling, stops syneresis and reshapes glycemic response is exactly the kind of multifunctional tool the clean-label food industry has been searching for.

Subject of Research: Modulation of potato and corn starch gelatinization, retrogradation and digestibility by the anionic polysaccharide Salecan

Article Title: Structure-dependent modulation of potato and corn starch gelatinization and retrogradation by Salecan

Article References: Xiong, W., Hu, L., Ni, C., Zhao, J., Huang, Y., Yang, X., Chen, P., & Chen, X. (2026). Structure-dependent modulation of potato and corn starch gelatinization and retrogradation by Salecan. Food Chemistry: X, 39, Article 104470. https://doi.org/10.1016/j.fochx.2026.104470

Image Credits: AI Generated

DOI: 10.1016/j.fochx.2026.104470

Keywords: Salecan, starch gelatinization, starch retrogradation, potato starch, corn starch, food hydrocolloids, rheology, X-ray diffraction, water migration, in vitro digestion, low glycemic index, clean label

The industrial problem they target is both old and enormous. Oxidation is one of the principal mechanisms of food deterioration, degrading nutritional quality, altering flavor, aroma and color, and shortening shelf life, particularly in lipid-rich products. To fight it, manufacturers have long relied on synthetic antioxidants such as butylated hydroxytoluene (BHT), butylated hydroxyanisole (BHA) and tert-butylhydroquinone (TBHQ). Yet mounting evidence of potential health risks, combined with a consumer shift toward natural ingredients and transparent ‘clean label’ products, has intensified the search for plant-based alternatives that can do the same job without the baggage of synthetic chemistry.

Phenolic compounds are the leading candidates in that search. This broad class of plant secondary metabolites includes flavonoids, phenolic acids and tannins, and their antioxidant power arises from a set of complementary chemical mechanisms: they scavenge free radicals, chelate transition metal ions that catalyze oxidation, and interrupt the chain reactions by which lipid peroxides propagate. When these mechanisms operate in a food matrix, lipid oxidation is delayed and shelf life is extended. The challenge is that plants produce these compounds as defensive responses to environmental stress, so their abundance depends heavily on where and how a species grows, and extracting them efficiently without damaging them has been an enduring technical obstacle.

This is where the Caatinga becomes strategically interesting. The biome’s plants endure high temperatures, intense solar radiation and prolonged water deficit, conditions that push them to biosynthesize phenolics as adaptive protection against oxidative stress. In other words, the very harshness that makes the Caatinga inhospitable appears to make its flora chemically rich. Barbatimão exemplifies the point. A member of the Fabaceae family, the species concentrates tannins, particularly in its bark, alongside flavonoids such as rutin and catechins and phenolic acids including gallic and caffeic acids. Its bark has a long history of empirical use in teas, tinctures and sitz baths for wounds, ulcers, gastritis and inflammatory conditions, and modern laboratory studies have shown that bark and leaf extracts exhibit pronounced free radical scavenging, lipid peroxidation inhibition and metal chelation activity.

Despite this promise, the authors argue that the technological valorization of Caatinga antioxidants has been held back by conventional methodology. Most published work relies on extraction systems built around volatile organic solvents that are poorly selective, energy-intensive and difficult to translate to food-grade applications, a mismatch with both green chemistry principles and current regulatory and consumer expectations. Conventional hydroalcoholic extraction, the standard approach in barbatimão research to date, may also leave complex phenolic fractions, such as high-molecular-weight condensed tannins, insufficiently extracted or chemically degraded during processing, meaning the full antioxidant arsenal of the plant has likely been underestimated.

The proposed solution is a pairing of two green technologies: natural deep eutectic solvents (NADES) and ultrasound-assisted extraction (UAE). NADES are tunable liquid systems formed by combining hydrogen bond acceptors, such as choline chloride, with hydrogen bond donors, including organic acids like lactic and citric acid, polyols such as glycerol, amino acids and sugars. Their effectiveness rests on extensive hydrogen-bonding networks and polarity matching, which favor the solubilization of hydroxylated aromatic structures, precisely the architecture of flavonoids, phenolic acids and condensed tannins. Choline chloride–organic acid and choline chloride–polyol combinations have already demonstrated high efficiency in pulling quercetin derivatives, gallic acid and catechins out of plant matrices.

Selectivity is the standout advantage. Because solvent composition can be rationally designed, acidic NADES systems tend to favor phenolic acids, while polyol-based systems are more effective for flavonoids and bulky tannins. This design flexibility means researchers can target specific bioactive fractions rather than accepting whatever a generic solvent happens to dissolve. The main technical limitation of NADES, their relatively high viscosity, which slows mass transfer, can be mitigated by adding water or by coupling the solvent with ultrasound. Acoustic cavitation disrupts cell walls, enhances solvent penetration into the plant tissue and accelerates mass transfer. Under optimized NADES–UAE conditions, recent studies across diverse plant materials report significant increases in total phenolic content and antioxidant activity, often exceeding conventional organic solvents while cutting extraction time and solvent consumption.

Applying this technology to barbatimão would be unprecedented, and the authors argue it could unlock underexplored phenolic fractions and clarify antioxidant mechanisms such as metal chelation and lipid oxidation inhibition that current extracts capture only partially. The food applications are equally forward-looking: many NADES constituents are non-volatile, low in toxicity and, in some cases, edible, which raises the possibility of using extracts directly or with minimal downstream processing, reducing costs and environmental impact while supporting clean-label claims. Computational tools are accelerating the design stage too, with approaches such as COSMO-RS, a Conductor-like Screening Model for Real Solvents, and machine learning enabling researchers to predict solvent–solute interactions and rationally tailor solvents to specific phenolic targets before any benchwork begins.

Significant hurdles remain before Caatinga antioxidants reach industrial shelves. Solvent viscosity, compound recovery, sensory impact on foods, and compliance with food safety regulations must all be systematically evaluated, and while NADES components are often regarded as safe, dedicated regulatory frameworks for their direct use in food systems are still under development, underscoring the need for toxicological and safety studies. The authors outline a research roadmap: rational optimization and scale-up of NADES systems with sustainability metrics such as energy efficiency, solvent recyclability and life cycle assessment; advanced chemical profiling using HPLC-DAD-MS/MS and metabolomics to identify bioactive fractions; and validation in real food matrices with kinetic and mechanistic analyses of antioxidant performance during processing and storage. Within that roadmap, S. rotundifolium serves as a proof-of-concept species, a demonstration of how one of Earth’s harshest and least-studied biomes can supply the sustainable, science-grounded ingredients that the food industry increasingly demands.

Subject of Research: Phenolic-based natural antioxidants from Caatinga plants as sustainable food additives using green extraction technologies

Article Title: Natural antioxidants from the Caatinga with insights from Stryphnodendron rotundifolium as a model for phenolic-based food additives

Article References: Ribeiro, M. A. M., Ferreira dos Santos, I. R., de Lima Pereira, J. F., Xenofonte, J. V. F., & da Costa, J. G. M. (2026). Natural antioxidants from the Caatinga with insights from Stryphnodendron rotundifolium as a model for phenolic-based food additives. Discover Green Chemistry, 1(1), Article 17. https://doi.org/10.1007/s44509-026-00019-x

Image Credits: AI Generated

DOI: 10.1007/s44509-026-00019-x

Keywords: phenolic compounds, Caatinga biome, Stryphnodendron rotundifolium, natural antioxidants, NADES, ultrasound-assisted extraction, green chemistry, food additives, tannins, clean label, Natural, antioxidants