Researchers at Boston University School of Public Health (BUSPH) and the University of California, Davis (UC Davis) analyzed retail scanner data from 71 stores across Berkeley and three comparison cities—Davis, Oakland, and Sacramento—covering quarterly sales of candy and soda by volume, along with healthier items such as nuts, seeds, and bottled water. The study window stretched from March 2019 through December 2023, a period deliberately chosen to capture sales both before and after the ordinance took effect and before it became enforceable on January 1, 2022. That two-phase timeline proved crucial. Because the policy was implemented in 2021 but only became enforceable in 2022, the researchers could separately estimate the effects of voluntary adoption and of active enforcement, offering a rare natural experiment in how the teeth of a regulation shape its outcomes.

The headline finding is striking: soda sales decreased substantially in Berkeley after the HCO was both implemented and enforced. The decline in sugary drink purchases was consistent across the study period, suggesting that removing soda from checkout displays—combined with the city’s ability to penalize noncompliance—genuinely curbed impulse buying of sugar-sweetened beverages. For a country in which, according to the Centers for Disease Control and Prevention, six in ten young people drink a sugar-sweetened beverage on any given day, even modest shifts at the point of sale carry meaningful implications for population health.

The picture for candy proved more nuanced. Sales of small-packaged candy—the format most typically stocked in checkout aisles—decreased significantly in supermarkets after enforcement began. This detail matters because the researchers deliberately examined sales by package size to test whether the ordinance achieved its intended goal: reducing purchases of the snack-sized items most associated with checkout displays. The drop in small-format candy in supermarkets, which were among the store types with the highest compliance, indicates that the policy did influence purchasing behavior in precisely the way its designers hoped.

Yet total candy sales told a different story. Overall candy purchases increased moderately after the policy was implemented, though that increase did not persist after enforcement. At the same time, sales of healthy, lower-sugar items such as snack-sized nuts and seeds rose as well—a sign that some shoppers, denied the candy at the register, substituted toward more nutritious options. The coexistence of rising total candy sales with rising healthy snack sales suggests that the ordinance reshaped the composition of impulse purchases more than it suppressed snacking altogether.

Store type emerged as a decisive moderator of the policy’s effectiveness. Supermarkets, which complied most thoroughly with the HCO, experienced the greatest declines in sales of sugary items. Drug stores, which complied the least, showed no reduction in candy or soda sales at all. This gradient is perhaps the study’s most actionable insight: the health benefits of checkout restrictions track directly with enforcement and compliance, not merely with the existence of a law on the books. A policy that stores ignore is a policy that fails.

“Through bright lighting, colorful packaging, and eye-level placement, checkout lanes are intentionally designed to draw shoppers’ attention to snacks and beverages with high added sugar,” said study co-lead author Dr. Justin White, associate professor of health law, policy and management at BUSPH, who led the analysis with Dr. Ziyue Xu, research scientist in the same department. “Our findings suggest that healthy checkout policies can help reduce impulsive purchases and even encourage healthier snack choices, but it is critical for cities to actively enforce these policies if they aim to see meaningful and sustained decreases in sugary product sales.”

White also emphasized a structural limitation of the ordinance itself. “The healthy checkout ordinance does not prohibit stores from simply relocating sugary drinks and snacks to other areas of the store, or including them in seasonal displays,” he noted. Because the policy regulates only the checkout zone, retailers retain full freedom to promote candy and soda elsewhere—in end caps, promotional aisles, and seasonal arrangements. This likely explains why total candy sales did not fall even as checkout-specific, small-format purchases declined. The scanner data, by design, could not capture these other placement or promotional changes that stores may have made to compensate for the lost checkout exposure.

The new findings build on earlier work led by Dr. Jennifer Falbe, senior and corresponding author of the study and associate professor of nutrition and human development in the Department of Human Ecology at UC Davis. Her prior assessments of store checkouts in Berkeley and nearby cities established that candy and sugar-sweetened beverages were among the most common items found in checkout aisles, and demonstrated that the amount of added sugar in checkout foods and beverages fell by 70 percent in the first year after the HCO was implemented. The latest study extends that story from what stores stock to what shoppers buy, closing the loop between retail environmental change and consumer behavior. “No single policy alone can address the problems with our food system,” Falbe said. “However, expanding healthy checkout policies to cover other prime locations and pairing this policy with evidence-based strategies like mandatory front-of-package labeling, sweetened-beverage excise taxes, and subsidies for healthy foods, could improve diet quality.”

The stakes of these findings extend well beyond Berkeley. Overconsumption of candy and sugar-sweetened beverages contributes to type 2 diabetes, heart disease, and tooth decay, and the 2025–2030 federal Dietary Guidelines for Americans recommend that children under 11 consume no added sugar at all. As other cities in the United States and other countries consider adopting similar checkout standards, the Berkeley experience offers both a proof of concept and a cautionary tale: the policy works where it is enforced and where its scope matches the retail strategies it seeks to counter.

The study also points toward regulatory synergy on the horizon. The US Food and Drug Administration is already weighing a mandatory front-of-package labeling rule, though the final label design remains undetermined. Falbe argued that a well-designed label could make placement policies far easier to administer. “If the FDA moves forward with a well-designed front-of-package label, they could make it easier to implement healthy-product-placement policies,” she said. “Stores and city inspectors could use ‘high in added sugar’ or ‘high in sodium’ labels, to spot products that should not be placed in prime locations like checkout lanes.” In other words, a standardized label would give both retailers and enforcement officers a clear, objective criterion for determining which products belong in the checkout lane and which do not—removing much of the ambiguity that currently complicates compliance.

Methodologically, the quasi-experimental design—comparing Berkeley stores against matched stores in nearby cities before and after the policy phases—strengthens causal inference in a field where randomized trials of retail policy are rarely feasible. By including multiple product categories and package sizes, and by stratifying results by store type and compliance level, the researchers were able to disentangle effects that a simpler before-and-after analysis would have blurred. The inclusion of nuts, seeds, and bottled water as outcome measures also allowed the team to detect substitution toward healthier choices, an outcome that many food policy evaluations overlook.

The research was coauthored by investigators at the Andrew M. and Jane M. Bursky School of Public Health at Washington University in St. Louis, the University of Illinois Chicago School of Public Health, and Stanford University School of Medicine, and was supported by the National Institute of Diabetes and Digestive and Kidney Diseases of the National Institutes of Health under Award Number R01DK135099.

Taken together, the findings position healthy checkout ordinances as a promising but incomplete tool in the fight against excess sugar consumption. They reduce the most impulsive, most heavily engineered sugary purchases—sodas and snack-sized candies at the register—and nudge some shoppers toward nuts and seeds instead. But as long as stores can pivot their promotional muscle to other corners of the shop, total candy sales may remain stubbornly resistant. The Berkeley experiment suggests that the future of food retail policy lies not in single interventions but in layered ones: checkout restrictions paired with taxes, labeling, and enforcement that give cities both the mandate and the means to change what shoppers see—and ultimately what they buy.

The research, published in the renowned tobacco control journal Tobacco Control, utilizes dynamic observational data and simulation modeling to examine the longitudinal impacts of the proposed legislation on smoking trends. The study’s methodology employs conservative assumptions, contrasting with prior government estimates, to deliver a more cautious but robust forecast of policy effectiveness. Whereas the UK government predicts a 30% cumulative annual reduction in smoking initiation based on previous age of sale changes, the Nottingham team applies a tempered 5% annual decrease informed by international comparative evidence. This methodological choice lends critical nuance to the projections while affirming the policy’s long-term transformative potential.

Central to the study’s findings is the predicted milestone that smoking prevalence among the targeted age group—the young population ranging from early adolescence to young adulthood—could plunge beneath 5% in the 2040s. Should the policy be enacted and enforced effectively, this milestone marks a significant acceleration compared to current trajectories, which anticipate much slower decreases without legislative reform. The model incorporates an array of variables, including enforcement intensity, public compliance, and socio-economic factors, underscoring the complex interdependencies influencing tobacco use behavior across demographically diverse populations.

A salient insight emerging from this simulation is the pronounced disparity in the timeline for achieving reduced smoking rates among males and socioeconomically deprived communities. The analysis reveals that, without targeted enforcement and cessation support, these groups are likely to reach the desired prevalence benchmark notably later than others. This points to an urgent need for tailored policy mechanisms and resource allocation to ensure equity in health outcomes and prevent the entrenchment of existing disparities tied to tobacco use.

The health benefits accrued from implementing the smokefree generation law extend well beyond reductions in smoking prevalence alone. The model estimates an impressive increase in healthy life years, projecting nearly 88,000 additional years of life in good health by 2075 compared to scenarios lacking the policy. This quantitatively evidences the substantial long-term public health dividends of drastically reducing smoking initiation and prevalence among youth. The amassed health gains translate to decreased burdens on healthcare systems and enhanced quality of life for millions, reflecting the profound societal implications of tobacco control initiatives.

Such significant health improvements are not distributed uniformly but cluster disproportionately within the most disadvantaged communities, which currently exhibit the highest smoking rates. Approximately 30% of the total projected healthy life years gained are expected to occur in the bottom quintile of deprived neighborhoods. This concentration highlights the policy’s potential to play a pivotal role in narrowing health inequalities historically exacerbated by tobacco addiction. However, achieving these benefits depends on integrating enforcement with culturally sensitive communication and accessible cessation programs within these communities.

Nathan Davies, the lead researcher affiliated with Nottingham’s School of Medicine, underscores the importance of nuanced policy implementation. He states that while the smokefree generation law holds great promise to disrupt tobacco initiation patterns meaningfully, its success hinges on effective enforcement and equitable delivery of support services. Community-targeted interventions will be essential to prevent marginalized populations from lagging as the rest of the population advances towards a tobacco-free future.

Notably, the Nottingham researchers’ projections diverge from those utilized by the UK government’s impact assessment due to methodological conservatism. While government models have taken inspiration from past shifts in the age-of-sale policy that saw a dramatic 30% annual decline in initiation, the research team favors a more restrained 5% assumption based on broader international evidence. Even with these conservative estimates, the study finds the policy could induce a substantial reduction in smoking rates and associated health benefits over forthcoming decades. If future data aligns with government projections, the under-5% smoking prevalence target could materialize as early as the 2030s.

Complementing these findings, prominent public health advocates emphasize the necessity of complementary measures accompanying age restriction policies. Hazel Cheeseman, Chief Executive of Action on Smoking and Health (ASH), warns that without comprehensive support systems, vulnerable groups may be excluded from the law’s benefits. She advocates for governmental transparency in detailing plans for universal cessation support, ensuring that smokers across all demographics receive tailored assistance in quitting, thereby preventing exacerbation of health disparities.

Aligned with this perspective, Alizée Froguel, prevention policy manager at Cancer Research UK, highlights smoking as the predominant cause of cancer deaths in England and applauds the proposed legislation as a landmark preventive measure. However, Froguel stresses that the law’s success is contingent upon vigorous enforcement, effective policy implementation, and sustained funding for cessation services. She draws urgent attention to socioeconomic disparities in smoking rates, which remain triple the national average in deprived areas, underscoring the demand for resource allocation that prioritizes communities hardest hit by tobacco addiction.

This emergent body of work from the University of Nottingham, supported by the National Institute for Health and Care Research (NIHR), invigorates the public health discourse with empirical simulation data substantiating the transformative potential of legislative action against tobacco sales. The fusion of robust statistical modeling with policy analysis enriches decision-making frameworks and challenges stakeholders to adopt comprehensive, equity-focused approaches that can meaningfully disrupt tobacco use trajectories into the mid-21st century.

In summary, the smokefree generation policy represents a pioneering public health initiative with the capacity to redefine tobacco consumption patterns among future generations. The gradual age escalation for tobacco sales enshrined in legislation could dramatically expedite declines in smoking initiation and prevalence, particularly benefiting historically marginalized and vulnerable populations. Remarkably, even the most conservative projections affirm substantial health gains and reductions in inequities, reinforcing the policy’s viability as a cornerstone of tobacco control strategy in England.

The implications of this research are profound. By articulating nuanced outcomes dependent on enforcement rigor, targeted communication, and cessation support, the study provides a roadmap for maximizing the law’s impact. Policymakers, healthcare providers, and community organizations alike must collaborate to operationalize these insights, ensuring that the nation leverages this once-in-a-generation opportunity to drastically curtail the devastating health burden of smoking and create a truly smokefree future.

Subject of Research: People

Article Title: Impact of the UK’s smokefree generation policy on tobacco-related equity in England: a simulation study

News Publication Date: 11-Feb-2026

Keywords: smokefree generation policy, tobacco control, smoking prevalence, simulation study, public health equity, tobacco legislation, smoking cessation, health inequalities, preventive policy, England, tobacco-related health outcomes

This policy initiative addresses a critical, yet often overlooked, dimension of climate change: occupational heat exposure. Long recognized in epidemiology and environmental health as a significant risk factor for heat-related illnesses, working outdoors during thermal extremes presents an urgent public health concern. Heat stress can impair cognitive function, reduce physical performance, and in severe cases, cause heat stroke or even death. Therefore, instituting mandatory work restrictions during peak heat hours is a proactive measure that attempts to circumvent these risks before harm occurs.

The cornerstone of this policy rests on the Worklimate heat risk forecasting system, which utilizes an array of meteorological and environmental data integrated with occupational risk assessments. By analyzing real-time temperature metrics, humidity, solar radiation, and wind patterns, the platform categorizes days according to risk severity: LOW, MODERATE, or HIGH. The “HIGH” designation triggers the prohibition of outdoor labor during the identified high-risk window. This approach melds advanced climatology with pragmatic occupational health interventions, highlighting the increasing role of technology in public health preparedness.

Italy’s decision to adopt this heat risk policy is also emblematic of broader efforts to align labor regulations with environmental realities. While numerous countries have recognized the dangers posed by rising heat, the implementation of legally binding working-hour restrictions contingent on heat forecasts represents an innovative regulatory frontier. By basing policy decisions on academic and scientific evidence, Italian regions demonstrate a commitment to evidence-based governance—a model potentially replicable in other heat-vulnerable regions worldwide.

The policy’s temporal focus on the hours between 12:30 p.m. and 4:00 p.m. reflects the climatological understanding of diurnal temperature fluctuations. Midday to early afternoon typically marks the window when solar radiation peaks, and ambient temperatures surge, amplifying heat exposure risks. Limiting outdoor work specifically across these hours is a scientifically sound strategy, designed to minimize the period during which workers are most vulnerable to heat stress, while allowing flexibility in work scheduling during cooler hours.

An important technical aspect of this initiative lies in its reliance on the Worklimate model’s predictive capacity. Forecast accuracy is vital to avoid unnecessary work stoppages or insufficient protection. The platform’s algorithms incorporate localized weather data and occupational heat exposure indices to provide a nuanced heat risk forecast for each region. This granularity ensures that restrictions are triggered only when there is credible evidence of hazardous conditions, maximizing both worker safety and economic continuity.

The implementation phase involved significant coordination among regional governments, health authorities, labor unions, and employers. Effective communication strategies were crucial in disseminating heat risk alerts and ensuring compliance. Workers received training on recognizing early signs of heat-related illness and understanding the legal framework underpinning these restrictions. The Italian case underscores how multidisciplinary collaboration is key to transforming scientific insights into practical, enforceable policies.

Preliminary assessments of the policy’s effectiveness suggest promising outcomes. Initial data indicate a decrease in heat-related occupational illnesses reported during the restricted hours, juxtaposed with prior years where no such mandated limits existed. While long-term epidemiological studies remain underway, early findings affirm that targeted temporal work halts based on heat risk forecasting can materially reduce occupational health burdens in extreme heat scenarios.

Nonetheless, the policy also raises critical questions about economic impacts and labor market adaptations. Some sectors reported challenges in rearranging work schedules and managing productivity losses during peak heat hours. However, insurers and economic analysts have posited that these short-term costs may be offset by reduced healthcare expenses and improved worker longevity and well-being. These findings underscore the importance of integrating occupational health policies within broader economic and social frameworks.

From a technical perspective, the Italian ordinance exemplifies how academic tools can shape policymaking in novel ways. The Worklimate system’s development stems from interdisciplinary research combining climatology, occupational health sciences, and data analytics. This fusion enables the creation of actionable, location-specific advisories that policymakers can deploy with confidence. Moreover, such technologies could evolve to incorporate climate change projections, allowing forward-looking labor protections that anticipate future heat risk scenarios.

Another salient dimension of this initiative is its potential to raise awareness about occupational heat hazards among both employers and workers. By institutionalizing heat risk as a tangible criterion triggering legal work restrictions, the policy fosters a cultural shift in how heat exposure is perceived within the labor environment. This normalization of heat risk management could stimulate broader workplace adaptations, such as improved hydration protocols, engineering controls, or modifications in personal protective equipment suited for hot conditions.

Globally, the Italian example arrives amid escalating discussions about climate justice and occupational equity. Outdoor workers often belong to socioeconomically disadvantaged groups who bear disproportionate burdens of climate-related health risks. Policies like Italy’s urgent ordinance acknowledge these disparities, aiming to shield vulnerable populations through systemic interventions rather than relying solely on individual resilience or employer discretion. Such governance approaches illustrate the ethical imperatives driving climate adaptation measures in labor markets.

Technological facilitation also extends into compliance monitoring and enforcement. Digital platforms linked to meteorological sensors enable governments to issue automated heat risk alerts and track adherence to work stoppages in real-time. This digital infrastructure enhances regulatory transparency and accountability, while reducing administrative burdens. In Italy, this integration has prompted dialogue about expanding digital occupational health monitoring to encompass other environmental hazards, marking a paradigm shift in labor regulation.

While the current policy targets a predefined high-risk period daily, future adaptations may involve more dynamic scheduling mechanisms tailored to rapidly changing weather patterns. Advances in wearable physiological sensors could complement ambient heat risk forecasts by providing individualized heat strain monitoring, thus personalizing work-rest cycles on-the-fly. This integration of environmental and biometric data represents a cutting-edge frontier for occupational heat stress management, with potential global applicability.

Ultimately, Italy’s urgent regional ordinances banning outdoor work during the hottest hours as forecasted by a sophisticated academic platform mark a milestone in climate-responsive occupational health policy. This case study underscores the power of multidisciplinary science, technology adoption, and forward-thinking governance to confront some of the most pressing and tangible consequences of global warming. As heat waves grow more frequent and intense worldwide, interventions like this may become indispensable tools in safeguarding worker health and maintaining economic vitality under changing climatic conditions.

This landmark policy also catalyzes broader conversations on resilience, worker rights, and climate justice in the labor domain. By institutionalizing protective measures grounded in empirical science and regional specificity, Italy’s approach provides a replicable blueprint for other countries facing the twin challenges of climate extremes and occupational hazard mitigation. For researchers, policymakers, employers, and workers alike, this development represents a beacon of innovation in the evolving nexus of climate change and human health protection.

Subject of Research:

Heat-related occupational health risks and the effectiveness of regional policies to prevent heat stress among outdoor workers in Italy, using an academic heat risk forecasting platform.

Article Title:

Exploring the effectiveness of a heat-related occupational prevention policy: A case study from Italy.

Article References:

Morabito, M., Crisci, A., Guerri, G. et al. Exploring the effectiveness of a heat-related occupational prevention policy: A case study from Italy. J Expo Sci Environ Epidemiol (2025). https://doi.org/10.1038/s41370-025-00831-w

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AI Generated

DOI:

10 December 2025