Dear Editor,
We would like to comment on ‘Exploring the Nonlinear Relationship Between Dietary Flavonoid Intake and Periodontitis’.1 Using data from the National Health and Nutrition Examination Survey (NHANES), this study investigated the relationship between flavonoid consumption and periodontitis, as well as the prevalence of periodontitis at various levels of flavonoid intake. The study discovered a strong inverse relationship between flavonoid consumption and periodontitis, particularly in the highest quartile of consumption, indicating a potential preventive impact. However, the study could not answer numerous key concerns, including the mechanisms underlying this link and which flavonoids may be most beneficial. Although the nonlinear link between flavonoid consumption and periodontitis is interesting, the study did not investigate why the preventive effect decreased beyond particular intake limits.
The study's reliance on cross-sectional data limits its ability to show a causal association between flavonoid consumption and periodontitis. The findings of this study may be influenced by reverse causality. Reverse causality implies that patients with periodontitis may alter their diets in response to their symptoms. Furthermore, while the analysis focused on overall flavonoid consumption, it is unclear if certain flavonoid-rich foods (eg, fruits, vegetables, tea, wine) play a substantial role in the reported effects. Future research could use longitudinal designs to better evaluate causal linkages and the long-term impact of flavonoid consumption on oral health.
An essential subject for broader discussion is whether flavonoids can be used as part of a periodontitis prevention approach, particularly in at-risk populations. Can targeted dietary interventions based on flavonoid-rich foods lower the prevalence of periodontitis? If so, what dosage and time are most effective? Other potential variables that may influence flavonoid consumption and periodontitis prevalence include socioeconomic status, smoking, and oral hygiene behaviours.
In terms of innovation and future prospects, future research might look into particular mechanisms of flavonoid impacts on periodontal health, such as antioxidant, antiinflammatory, and antibacterial properties. The absorption and metabolism of periodontal tissue-associated flavonoids could provide more information on their potential usefulness. Furthermore, research that focuses on individual flavonoids or dietary combinations of these chemicals may provide more specific and actionable dietary advice for preventing or managing periodontitis.
Conflict of interest
None disclosed.
Acknowledgments
Funding
This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
Author contributions
H.D.: 50% ideas, writing, analysing, approval. V.W.: 50% ideas, supervision, approval.
AI declaration
The author uses language editing computational tools in preparation of the article.
Data availability
There is no new data generated.
Reference
- 1.Li H, Li L, Yang S, et al. Exploring the nonlinear relationship between dietary flavonoid intake and periodontitis. Int Dent J. 2024 doi: 10.1016/j.identj.2024.10.015. 10.1016/j.identj.2024.10.015 S0020-6539(24)01569-7. Online ahead of print. [DOI] [PubMed] [Google Scholar]
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Data Availability Statement
There is no new data generated.