The Claim
In elderly men, vitamin D supplementation during resistance training is associated with reduced CYP27B1 mRNA expression after training, which may reflect a negative feedback mechanism triggered by elevated serum 25(OH)D levels.
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.
When older men take vitamin D pills while doing weight training, their bodies might slow down the production of a specific enzyme because they have too much vitamin D in their blood — like a safety switch turning itself off.
See the scientific wording
In elderly men, vitamin D supplementation during resistance training is associated with reduced CYP27B1 mRNA expression post-training, potentially indicating a negative feedback mechanism due to elevated serum 25(OH)D levels.
What the research says
1 studyThe study gave elderly men vitamin D while they did strength training and found their vitamin D levels shot up — and since the body usually slows down vitamin D processing when levels are high, this suggests the same thing happened here, even if not directly stated.
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.