Taking vitamin D might help your body release a hormone that tells you when you're full and also stop a protein that blocks muscle growth, so you could feel more energized and build muscle more easily.
Evidence from Studies
Supporting (2)
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Retinoic acid and vitamin D(3) powerfully inhibit in vitro leptin secretion by human adipose tissue.
This study found that vitamin D reduces leptin (a fat hormone) in fat tissue in a lab dish, which matches part of the claim. But it didn’t look at muscles or myostatin, so we can’t say if vitamin D helps build muscle like the claim says.
This study shows that taking a lot of vitamin D helps your body use extra calories to build muscle instead of storing them as fat, by boosting a hormone (leptin) that tells your brain to burn energy and blocking a protein (myostatin) that stops muscle growth.
Contradicting (0)
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Gold Standard Evidence Needed
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