Clinical decision-support only. For use by licensed dental professionals. Not a substitute for professional judgment or a complete drug reference. Always verify with primary sources.
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Vitamin

Vitamin D

Likelihood in at-risk patientsModerate

Likelihood of deficiency within an at-risk group, not the general population.

Evidence confidenceModerate

Strength of the peer-reviewed evidence.

Food sources

Fatty fish (salmon, mackerel), Fortified milk and cereal, Egg yolks, Sunlight exposure

Typical intake: 600 IU (15 mcg)/day for most adults ages 1–70 (800 IU/70+); higher for older adults. Confirm with the physician if supplementing.

Upper limit: 4,000 IU (100 mcg)/day for most adults.

Dental & oral effects of deficiency

  • Reduced alveolar bone density

    Poor calcium regulation from vitamin D deficiency can contribute to alveolar bone loss and impaired healing after periodontal or extraction procedures.

  • Thin, pitted or weak enamel in children (enamel hypoplasia)

    In children, inadequate vitamin D (with calcium/phosphorus) is linked to defective enamel mineralization.

  • Higher risk of gum disease (periodontitis)

    People with chronic periodontitis have significantly lower blood vitamin D (25(OH)D) levels than periodontally healthy people; low intake is also associated with more periodontal disease.

    Clinical management: In patients with periodontitis that responds poorly to therapy, ask about known vitamin D deficiency, limited sun exposure or malabsorption, and suggest checking levels with their physician. Adjunctive supplementation during scaling/root planing is not yet proven, so do not promise a treatment benefit.

Associated with deficiency

  • Osteomalacia / rickets: Softened, poorly mineralized bone.
  • Osteoporosis (contributing factor): Reduced bone mineral density, including the jaws.

Dental & oral effects of surplus / excess

No well-established oral-specific effect of excess intake on file.

General toxicity (not necessarily oral-specific)

  • Hypercalcemia: Excess vitamin D raises calcium absorption; can cause nausea, weakness, and kidney stones. No well-established oral-specific effect.

Sources

  1. Position of the Academy of Nutrition and Dietetics: oral health and nutrition. Touger-Decker R, Mobley C, Academy of Nutrition and Dietetics. Journal of the Academy of Nutrition and Dietetics, 2013.
  2. Vitamins and oral mucosal diseases: From bench to the bedside. Yesudian RI, Yesudian PD. Clinics in dermatology, 2026.
  3. A Prescription for Change: Food as Medicine & the Vital Role of Nutrition in Patient Care. teethFirst. Continuing education course material, 2025.
  4. Vitamin D and Periodontitis: A Systematic Review and Meta-Analysis. Machado V, Lobo S, Proença L et al. Nutrients, 2020.
  5. Vitamin intake and periodontal disease: a meta-analysis of observational studies. Mi N, Zhang M, Ying Z et al. BMC oral health, 2024.