Vitamin D and your mouth: what the evidence says

Do You Know? For patients.

Vitamin D is known for helping the body absorb calcium. Its role in the mouth reaches further, but the evidence is still developing.

What we know

• Vitamin D helps the gums' defences: it supports the protective lining and the production of natural antibacterial substances.

• Low vitamin D has been linked with gum disease and decay in observational studies, but these links may partly reflect other health and lifestyle factors.

• A 2026 review of trials found that adding vitamin D supplements to gum treatment did not give a measurable extra benefit.

What this means for you

• Vitamin D deficiency is common in the Gulf region. If you are concerned, ask your doctor whether your level should be checked.

• Do not rely on supplements to protect your teeth or gums. Daily cleaning, fluoride and regular check-ups matter most.

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This article is general information and not a substitute for an examination.

References

1. Gillani Haji A, et al. The effect of vitamin D supplementation on periodontal health: a systematic review and meta-analysis. Evid Based Dent. 2026. doi:10.1038/s41432-026-01244-w

2. Turaliyeva M, et al. Vitamin D as a candidate host susceptibility factor in sugar-driven oral dysbiosis. Front Oral Health. 2026;7:1850800. doi:10.3389/froh.2026.1850800