As tobacco-free nicotine pouches become more widely available, understanding their effects on oral health has become an important area of scientific research. Every new study contributes to a growing evidence base that should inform clinicians, regulators, and policymakers.
A recently published study in Oral Diseases examined oral lesions and dental status among users of tobacco-free nicotine pouches, reporting a higher prevalence of localized oral mucosal lesions at pouch placement sites compared with non-users. These findings deserve careful consideration and add valuable information to an emerging area of research.
However, they should also be interpreted within the broader scientific literature. Like much of the current evidence on nicotine pouches, the study provides an important snapshot but does not settle questions about long-term oral health outcomes or disease risk.
For GINN, this reinforces an important principle: regulation should be informed by the totality and quality of evidence rather than by individual studies considered in isolation.
An Important Contribution to an Emerging Evidence Base
The Oral Diseases study reports that localized mucosal lesions were more frequently observed among nicotine pouch users than among non-users. These findings suggest that repeated placement of nicotine pouches may be associated with localized tissue changes that warrant continued clinical attention and monitoring.
At the same time, the study found no statistically significant increase in dental caries or periodontal disease among nicotine pouch users, despite reported use extending to approximately six years in some participants.
These observations contribute important information about possible local oral effects but should not be interpreted as demonstrating long-term disease progression or establishing causation.
Understanding the Study’s Limitations
The study is cross-sectional, meaning that participants were examined at a single point in time. While this design can identify associations, it cannot determine whether nicotine pouches caused the observed lesions or whether those lesions are temporary, reversible, or clinically significant over the long term.
The authors themselves acknowledge these limitations and explicitly recommend further longitudinal research to clarify both local and systemic health effects.
This distinction is particularly important for policymakers. Individual observational studies contribute valuable evidence, but they should not be interpreted as establishing definitive conclusions about long-term health outcomes or causation.
The Broader Evidence Remains Limited
The findings should also be interpreted within the context of the wider scientific literature, which consistently concludes that evidence on the oral health effects of nicotine pouches remains limited and that substantially more research is required before firm conclusions can be drawn.
A 2024 systematic review published in Frontiers in Oral Health identified only three eligible human studies involving approximately 190 participants. While localized mucosal changes, including transient white lesions, irritation, wrinkling of the oral mucosa, and dry mouth, were reported, the authors concluded that the available evidence was insufficient to determine either the short- or long-term oral health effects of nicotine pouch use. They specifically called for well-designed prospective cohort studies with standardized clinical outcomes and longer follow-up periods to better characterize oral health risks.¹
Similarly, a 2024 critical review published in the Journal of the American Dental Association concluded that evidence regarding oral nicotine pouches remains heterogeneous, largely observational, and frequently confounded by smoking history. The review cautioned that current evidence does not support definitive conclusions regarding long-term oral disease and recommended more rigorous longitudinal human studies before strong claims about oral health risks can be made.²
A review published in the British Dental Journal reached comparable conclusions. While acknowledging reports of localized irritation and minor oral symptoms, the authors emphasized that current evidence is insufficient to establish robust conclusions regarding serious oral disease, recommending continued surveillance, careful clinical documentation, and further research rather than alarmist interpretations.³
More recently, a 2026 review in Frontiers in Oral Health similarly concluded that the evidence base remains limited and emphasized the need for longitudinal studies capable of distinguishing reversible placement-site changes from clinically meaningful disease progression. The authors also highlighted the importance of accounting for previous smoking history and other confounding factors when evaluating oral health outcomes.⁴
Collectively, these independent reviews point to a consistent conclusion: localized oral changes should be monitored and investigated, but the current scientific evidence does not support definitive claims regarding long-term oral disease caused by nicotine pouch use. Rather than presenting a settled scientific consensus, the literature repeatedly calls for larger, higher-quality longitudinal studies before firm regulatory or clinical conclusions can be reached.
Looking at the Totality of Evidence
Across the available literature, the most consistently reported findings relate to localized mucosal changes at the site where nicotine pouches are placed, accompanied in some users by transient soreness, irritation, or dry mouth. These observations deserve continued clinical attention and ongoing surveillance.
However, the current body of evidence does not demonstrate that nicotine pouch use causes clinically significant periodontal disease, oral cancer, or other chronic oral diseases. Existing studies have not established causal relationships, nor have they shown progression from localized placement-site lesions to serious long-term pathology.
For regulators, clinicians, and researchers, this distinction is critical. Good public health policy depends on accurately distinguishing between observed local tissue responses and proven long-term disease outcomes, particularly where the available evidence remains limited.
Evidence from Smokers Who Switch
An important part of the discussion often receives less attention: what happens when smokers switch from cigarettes to nicotine pouches?
Recent controlled clinical research has reported improvements in several standard oral health indicators among adult smokers who switched completely to nicotine pouches compared with those who continued smoking.
In one randomized study, participants who transitioned from cigarettes to tobacco-derived nicotine pouches experienced significant improvements in gingival health, bleeding indices, and oral hygiene scores over a 24-week period. The investigators concluded that nicotine pouches did not adversely affect oral health during the study period and that switching from combustible cigarettes was associated with measurable improvements in several clinically relevant oral health outcomes.
These findings are consistent with a tobacco harm reduction perspective. While nicotine pouches are not risk-free, reducing exposure to the combustion products found in cigarette smoke may produce measurable oral health benefits for smokers who are unable or unwilling to quit nicotine entirely.
What This Means for Regulation
For GINN, the regulatory implications are straightforward.
Localized oral lesions and minor symptoms should be acknowledged, monitored, and investigated further. Healthcare professionals should encourage users experiencing persistent irritation to seek dental assessment, while manufacturers should continue improving product quality and safety.
However, regulators and commentators should also avoid overstating oral health risks on the basis of preliminary observational evidence, particularly where smoking history, oral hygiene practices, and other behavioural factors may influence outcomes.
An evidence-based approach should recognise three important points.
First, localized mucosal changes and minor oral symptoms are commonly reported and deserve continued surveillance.
Second, current clinical evidence suggests that smokers who switch completely to nicotine pouches may experience improvements in several important oral health indicators compared with continuing to smoke.
Third, the scientific community itself continues to call for more rigorous longitudinal research before firm conclusions can be reached regarding long-term oral disease risk.
Building Better Evidence
The publication of this latest study should not be viewed as the conclusion of the scientific discussion but as another valuable contribution to it.
Good public health policy depends on continuously improving evidence. That requires independent longitudinal cohort studies, standardized clinical assessments, mechanistic research, and careful differentiation between localized, placement-related tissue responses and clinically meaningful long-term disease.
As nicotine products continue to evolve, regulatory frameworks should evolve with the evidence.
GINN supports continued independent research into both the benefits and risks associated with novel nicotine products. The objective should not be to minimise emerging findings nor to amplify preliminary observations beyond what the evidence supports.
Instead, effective regulation should remain grounded in the same principle that underpins good science: evaluating the totality of evidence, recognising uncertainty where it exists, and allowing policy to develop as the evidence becomes stronger.
Importantly, the call for further research is not a criticism of emerging evidence, it is part of the scientific process. As the evidence base evolves, regulatory decisions should continue to reflect the totality of high-quality evidence, recognising both observed findings and the uncertainties that remain.
References
Lynch et al. (2024). What is the impact of nicotine pouches on oral health: a systematic review. Frontiers in Oral Health. (PMC11297755)
Kopycka-Kedzierawski et al. (2024). Oral health risks in adults who use electronic nicotine delivery systems and oral nicotine pouches: a critical review of the literature and qualitative synthesis of the available evidence. Journal of the American Dental Association. (PMID: 39736680)
Patel & Sherriff (2023). Nicotine pouches: a review for the dental team. British Dental Journal.
Hatsukami et al. / Frontiers in Oral Health (2026). Nicotine pouches, oral cancer and tobacco harm reduction.
