The Claim

Direct overexpression of the vitamin D receptor in skeletal muscle induces hypertrophy by activating mTOR signaling, increasing protein synthesis, expanding satellite cell pools, and suppressing myostatin.

Source: ‘High Dose Vitamin D’s Steroid-like Effect! Crazy!’

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
44score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

How it works
1 study reviewed
In plain English

If you make muscle cells produce more of a protein called the vitamin D receptor, the muscles get bigger because they start making more protein, grow more repair cells, and stop a protein that normally limits muscle growth.

See the scientific wording

Direct overexpression of the vitamin D receptor in skeletal muscle induces hypertrophy by activating mTOR signaling, increasing protein synthesis, expanding satellite cell pools, and suppressing myostatin.

What the research says

1 study
  1. Study: Overexpression of the vitamin D receptor (VDR) induces skeletal muscle hypertrophy

    Scientists made muscle cells in rats produce more of a protein called VDR, and the muscles got bigger because they made more protein and grew more repair cells — just like the claim said.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.