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Evidence-Based Supplement Research

Evidence-Based Supplement Research

Vitamin D and Increased 25-Hydroxyvitamin D Concentration

Doses used in studies

IU/day: 400–800 (median 600, IQR 400–800) — 1 study

Time to effect

Median: 6.1 months · IQR 6.1 months–6.1 months · Range 6.1 months–6.1 months — Reported in 1 of 1 study

1 of 1 paper

Assessment of the effect of routine-dose vitamin D3 supplementation in Chinese women of childbearing age with vitamin D insufficiency.
- 2025-05-30
- RCT · n = 44
- European journal of nutrition 64(5)
- - Xiaoyun Shan
  - Wenxuan Wu
  - Jingxin Yang
  - Yang Cao
  - Yuting Li
  - Yichun Hu
  - Rui Wang
  - Lichen Yang
- PubMed: 40445221
- DOI: 10.1007/s00394-025-03723-9
4 Insights on
- Increased 25-Hydroxyvitamin D Concentration
- High evidence
- Rigorous Journal
- Clinical
significant increases in... free 25(OH)D... concentrations compared with baseline
Effect
Beneficial
Effect size
Moderate
Significant
Yes
Dose
400 IU/day or 800 IU/day