Research
Micronutrients & recovery
Vitamin D3 supplementation may significantly reduce diabetes risk in individuals with severe vitamin D insufficiency (baseline <12 ng/mL), although this finding is from a post hoc subgroup analysis.
If you are severely vitamin D deficient (levels <12 ng/mL), supplementation with 4000 IU of Vitamin D3 daily might significantly lower your diabetes risk. However, this was a small subgroup analysis, so consult your doctor to check your levels before relying on this.
ModerateQualifiesMEDIUM confidence
In a post hoc analysis of data from participants with a baseline 25-hydroxyvitamin D level of less than 12 ng per milliliter (30 nmol per liter) (103 participants), the hazard ratio in the vitamin D group was 0.38 (95% CI, 0.18 to 0.80).
Why this rating
Post hoc subgroup analysis with small sample size (n=103) and wide confidence intervals; not powered for this specific claim.
Source
Vitamin D Supplementation and Prevention of Type 2 Diabetes
Anastassios G. Pittas et al. · New England Journal of Medicine · 2019
DOI 10.1056/nejmoa1900906
rct · n=2423Cited 657×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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