The Claim
In rat L6 myoblasts, knockdown of the vitamin D receptor (VDR) reduces the expression of MyoD by 44% and Myogenin by 64% under vehicle conditions, and treatment with 1,25-dihydroxyvitamin D3 at 10 pM or higher reverses this suppression.
What the research says
Roughly balanced
Support and challenge are close. The picture may shift as more studies come in.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
When scientists reduce a specific vitamin D sensor in rat muscle cells, the cells make less of two important muscle-building proteins—but giving them a tiny amount of active vitamin D brings those proteins back up.
See the scientific wording
In rat L6 myoblasts, knockdown of the vitamin D receptor (VDR) reduces expression of MyoD and Myogenin by 44% and 64%, respectively, under vehicle conditions, but this suppression is reversed by treatment with 1,25-dihydroxyvitamin D3 at 10 pM or higher.
What the research says
1 studyStudy: 1,25‐Dihydroxyvitamin D3 Mediates L6 Myoblast Differentiation via Vitamin D Receptor (VDR)
Scientists turned off the vitamin D receptor in rat muscle cells, which made key muscle genes weaker — but when they added a strong form of vitamin D (even in tiny amounts), those genes bounced back. This matches what the claim says.
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.