3/5
Moderate
evidence
Micronutrient evidence brief
Vitamin D
Correcting low vitamin D status may support musculoskeletal health; performance gains in athletes are inconsistent.
Headline Finding
2023 athlete meta-analysis: no statistically significant maximum-strength or power improvement overall.
Dose Context
Best guided by 25(OH)D testing, diet, sun exposure, body size, and clinician advice for high-dose use.
Important Caveat
Not a general strength booster for users who are already vitamin-D replete.
Source Drawer
Linked Research
- Meta-analysis Athlete strength/power meta-analysis
- Meta-analysis 2024 athlete strength meta-analysis
- Systematic review Elite athlete systematic review
- Meta-analysis Vitamin D3 athlete meta-analysis
- Meta-analysis Indoor/outdoor athlete status meta-analysis
How To Read This Rating
The score reflects evidence that the supplement does its stated job. Some jobs are direct, such as strength, endurance, or recovery; others are indirect, such as sleep, mood, appetite, or health support. A real effect can still receive a cautious practical rating when dose, safety, product quality, or audience fit remain uncertain.
Spot An Evidence Issue?
Send the disputed claim, source link, and why it changes the practical verdict. Corrections that materially affect the claim, dose, caveat, or rating are prioritized.
Report a source or rating issue