Most Sugar-Tax Laws Never Mention Teeth, Global Policy Map Finds

Sugar-sweetened beverage taxes have spread to more than a hundred countries and territories, yet almost none of the laws that create them say a single word about teeth. That is the central finding of a global evidence and policy mapping study published in Frontiers in Oral Health, which examined sugar-sweetened beverage taxation (SSBT) frameworks around the world and asked two questions: how often oral health appears in the written policy rationale, and whether jurisdictions actually collect the dental data needed to judge whether the taxes work for oral health. The answer to the first question was essentially never in legal texts, and only occasionally in supporting documents. The answer to the second was that only a minority of jurisdictions could even in principle carry out such an evaluation.

The research team, led by Ava Vukovic of the University of Belgrade and Guglielmo Campus of the University of Gothenburg and Sapienza Università di Roma, with collaborators in Italy, Switzerland, Germany, Sweden and Chile, identified 129 countries, territories or jurisdictions with documented sugar-sweetened beverage taxes. After applying eligibility criteria, 117 jurisdictions entered the final analysis. According to the study, the unit of analysis was deliberately broad: it included sovereign states as well as territories with independent fiscal authority to implement a tax, in order to capture every independently implemented SSBT-related fiscal policy, regardless of when it was introduced or what its original legislative intent had been.

The documentary analysis produced a strikingly uniform result. None of the SSBT legal texts reviewed included dental caries or oral health as an explicit legal objective. This absence held across every World Health Organization region and every national income category. When the researchers widened the net to related implementation documents — governmental reports, background policy analyses and strategic health plans — the picture improved only marginally. Twenty-two jurisdictions, or 18.80 percent, included oral health or dental caries as an explicit objective, and five jurisdictions, or 4.27 percent, mentioned it as a secondary or collateral benefit of reducing sugar consumption. The remaining 90 jurisdictions, 76.93 percent, contained no documented oral-health reference at all in the material reviewed.

The authors are careful about what this absence does and does not mean. A document coded as “oral health not addressed” denotes the absence of a documented reference in the material reviewed, not proof that oral health was absent from the deliberations that produced the policy. Oral health may have been considered implicitly within broader objectives concerning sugar consumption, nutrition or non-communicable disease prevention. The findings therefore concern documented policy framing rather than the full decision-making process — a distinction that matters for anyone tempted to read the result as evidence of active neglect.

The study's second strand assessed the availability of epidemiological dental caries data, using the Decayed, Missing and Filled Teeth (DMFT) index in 12-year-old children, before and after tax implementation. The 12-year-old age group was chosen because the WHO recommends it as a standard indicator for international oral-health comparisons: most children at this age have a complete permanent dentition, they are still the oldest group attending primary schools in most countries, and they show greater dietary independence from their parents, making them particularly relevant for assessing beverage consumption patterns. The researchers searched PubMed, Scopus and Google Scholar, supplemented by hand searches, backward citation, snowball sampling, the WHO-CAPP Malmö database, and doctoral and master's theses in national languages.

The data-availability picture was lopsided. Among the 117 jurisdictions, eligible age-12 DMFT data were available only before tax implementation for 73 jurisdictions (62.4 percent), both before and after implementation for 25 (21.4 percent), only after implementation for 7 (6.0 percent), and neither before nor after for 12 (10.3 percent). Overall, pre-tax DMFT estimates were far more frequently available than post-tax estimates — 83.8 percent versus 27.4 percent. Only 38 jurisdictions, or 32.48 percent, had DMFT data available both before and after implementation when counted at the jurisdiction level in the abstract’s summary figure. The researchers stress that the presence of data before and after implementation is an indicator of potential evaluative capacity, not evidence that the available data are directly comparable or sufficient for causal policy evaluation, and not evidence of any effect of the taxes themselves.

Regional patterns were pronounced. By contrast, explicit references were concentrated in the WHO Western Pacific Region, where 20 of 21 jurisdictions (95.24 percent) included them, while elsewhere they were almost entirely absent: one jurisdiction in the Region of the Americas, one in South-East Asia, and none in Africa, Europe or the Eastern Mediterranean. The authors suggest this clustering may partly reflect the inclusion of Pacific Island countries, where policy discussions around sugary drinks often explicitly connect sugar consumption with dental disease, obesity, diabetes and health-system financing. They caution that this should be read as a regional policy pattern rather than evidence of independent country-level effects.

Economic context also showed associations, though the authors urge restraint in interpreting them. In a complete-case analysis restricted to the 110 jurisdictions with observed per capita Gross National Income values, median pGNI was USD 3,970 in the explicit-reference group (n = 18), USD 42,130 in the secondary-reference group (n = 5), and USD 2,150 in the oral-health-not-addressed group (n = 87). The distributions differed significantly across the three categories (Kruskal–Wallis H(2) = 7.68, p = 0.022), but the authors emphasize that this ecological association should not be interpreted as evidence that national income determines policy framing, particularly given the small secondary-reference group and the wide dispersion of pGNI values, which ranged from USD 110 to USD 117,160 in the not-addressed group alone. The pattern is also not monotonic: the secondary-reference group had the highest median income but contained only five units.

A historical analysis added a further nuance. The researchers grouped implementation years into three eras — before 2000, 2000–2014 and 2015–2023 — covering 16, 45 and 56 jurisdictions respectively. Explicit oral-health references appeared in 25.0 percent, 22.2 percent and 14.3 percent of units in these periods, and secondary references occurred only in the most recent period, in 8.9 percent of units. The distribution across periods did not differ significantly (Fisher-Freeman-Halton exact test, p = 0.201), so the data did not demonstrate a clear temporal shift toward more frequent explicit oral-health framing in more recently introduced taxes. The authors note an important caveat: the implementation year of a tax is not necessarily the publication year of every policy document reviewed, and older fiscal measures may have been discussed within newer health-policy frameworks later. Many early taxes were general excise or consumption taxes rather than health-oriented interventions — the World Bank database records introduction dates of 1965 for Brazil, 1969 for Niue and 1976 for São Tomé and Príncipe, reflecting when a taxing instrument took effect rather than early health policy. Brazil is illustrative: country-level analyses describe its IPI as a general manufactured-goods levy and conclude the country has no SSB-specific tax, its rate having fallen in 2016 and 2018. Almost one-third of SSB excise taxes worldwide tax unsweetened bottled water at equal or higher rates.

The study’s broader point is about evidence infrastructure rather than tax efficacy. Robust modeling studies have supported SSBTs’ cost-effectiveness in reducing obesity and related non-communicable diseases, and econometric modeling and global reviews suggest fiscal policies on sugary drinks can serve as an effective oral-health strategy, mitigating the burden of dental caries and reducing dental treatment expenditures across diverse healthcare systems. Yet obesity and diabetes outcomes are often monitored through established national surveillance systems, while dental caries data are not, creating what the authors call an evidence asymmetry that may reinforce the exclusion of oral health from future policy considerations. The authors argue that explicitly incorporating oral-health objectives and surveillance indicators into SSBT frameworks — aligning with the WHO Global Strategy on Oral Health and the common risk factor approach to non-communicable disease prevention — would strengthen the accountability, comprehensiveness and public-health value of these policies, particularly in low- and middle-income countries where preventive policies may offer the greatest returns on investment given limited treatment capacity. As the authors state, the study was designed as a global evidence and policy mapping study that documents where the written record and the surveillance data fall short; it does not aim to estimate the causal effect of sugar taxes on dental caries.

Subject of Research: Global mapping of oral-health policy framing and dental caries data availability in sugar-sweetened beverage taxation jurisdictions

Article Title: Sugar-sweetened beverage taxation, oral health policy framing, and dental caries data availability: a global policy and evidence mapping study

Article References: Vukovic, A., Arghittu, A., Lamloum, D., Dettori, M., Bertilsson, C., Gambetta-Tessini, K., Castiglia, P., Lingström, P., Giacaman, R. A., & Campus, G. (2026). Sugar-sweetened beverage taxation, oral health policy framing, and dental caries data availability: a global policy and evidence mapping study. Frontiers in Oral Health, 7, Article 1940529. https://doi.org/10.3389/froh.2026.1940529

Image Credits: AI Generated

DOI: 10.3389/froh.2026.1940529

Keywords: sugar-sweetened beverage tax, dental caries, oral health policy, DMFT index, public health, health policy framing, WHO regions, non-communicable diseases, policy mapping, epidemiological surveillance, per capita gross national income, Frontiers in Oral Health