The clinical assessments, including intraoral examinations and periodontal probing, appear to be systematically performed, lending some credibility to the data collection process.

However, several limitations undermine the robustness of the conclusions. First, the study’s cross-sectional design precludes causal inference. The authors observe a higher prevalence of gingival recession and mucosal changes—such as leukoplakia-like lesions—in nicotine pouch users compared to non-users, but they cannot determine whether these changes are caused by nicotine exposure, duration of use, user behavior (e.g., pouch placement), or unmeasured confounders such as dietary habits or concomitant alcohol use. For instance, the study does not account for prior tobacco use among participants, a significant omission given that many nicotine pouch users are former smokers or dual users. Residual confounding from past tobacco exposure could skew the results.

Moreover, the sample size and recruitment method raise concerns. The study draws participants from a single geographic region and relies heavily on self-selection, potentially introducing selection bias. The user group includes individuals with widely varying pouch usage patterns (frequency, duration, brand), yet the analysis treats them as a homogeneous cohort. This aggregation diminishes the study’s power to detect dose-response relationships—a critical factor in assessing harm. Without stratification by daily pouch count or years of use, the findings remain broad and speculative.

Perhaps most troubling is how the article frames its results. While it reports a statistically significant increase in gingival inflammation and localized mucosal changes among users, it downplays these findings by suggesting they are “mild” and “reversible.” This minimization risks normalizing early pathological changes that could progress to more serious conditions. Gingival recession, for example, is not merely an aesthetic issue—it predisposes individuals to root caries, dentin hypersensitivity, and eventual tooth loss. Similarly, leukoplakia-like lesions, even if non-dysplastic in this cohort, are clinical red flags that demand longitudinal monitoring, not dismissal.

The authors also overlook mechanistic plausibility. Nicotine is a known vasoconstrictor, reducing gingival blood flow and impairing tissue repair. Chronic exposure—even in the absence of tobacco—may therefore contribute to periodontal compromise. The article would have been strengthened by including biochemical markers of inflammation (e.g., gingival crevicular fluid cytokines) or histological analysis of biopsied lesions to substantiate clinical observations.