The Claim
Daily supplementation with 8000 IU of vitamin D for 12 weeks does not enhance improvements in muscle strength or lean body mass during supervised resistance training in young men who are initially vitamin D-deficient, even though the supplementation successfully raises serum 25(OH)D levels from deficient to sufficient ranges.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Taking a high-dose vitamin D pill every day for three months won't help young men who are low on vitamin D build more muscle or gain more lean body mass from weight training, even though their vitamin D levels go up to normal.
See the scientific wording
Vitamin D supplementation at 8000 IU daily for 12 weeks does not enhance gains in muscle strength or lean body mass during supervised resistance training in vitamin D-deficient young men, despite effectively raising serum 25(OH)D levels from deficient to sufficient ranges.
What the research says
1 studyEven though the men took a lot of vitamin D and their blood levels improved, they didn’t get stronger or gain more muscle than the men who took a fake pill — so the vitamin D didn’t help with their workout results.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.