When mice don’t get enough vitamin D from their diet, their muscles start breaking down more because certain proteins that signal muscle loss become more active.
See the scientific wording
Diet-induced vitamin D deficiency in mice is associated with increased expression of myostatin and the muscle atrophy marker MuRF1, suggesting that low vitamin D levels may promote muscle wasting through upregulation of catabolic pathways.
Correlational — new studies may shift this
ObservationalOne low-scoring study links this claim to the outcome, but causation is not established.
What the research says
1 study reviewedSupporting (1)
Cohort StudyAnimal2015
When mice don’t get enough vitamin D from their diet, their muscles get weaker and start breaking down, and this happens because two specific proteins (myostatin and MuRF1) that cause muscle loss become more active.
Contradicting (0)
No contradicting studies found yet
That doesn't mean it's settled — it just means no study has tested the opposite.
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Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting study
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When mice don’t get enough vitamin D from their diet, their muscles start breaking down more because certain proteins that signal muscle loss become more active.
Evidence from Studies
Supporting (1)
Community contributions welcome
When mice don’t get enough vitamin D from their diet, their muscles get weaker and start breaking down, and this happens because two specific proteins (myostatin and MuRF1) that cause muscle loss become more active.
Contradicting (0)
Community contributions welcome
Score Breakdown
No multi-axis breakdown available yet. The overall Pro / Against score above is the best signal.
- No clinical evidence is available; the score reflects mechanistic plausibility only.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Systematic Review of Diet-Induced Vitamin D Deficiency and Muscle Atrophy Markers in Animal Models
Includes only controlled animal studies with diet-induced vitamin D deficiency, measuring myostatin and MuRF1 expression and muscle mass outcomes across multiple labs.
Randomized Controlled Trial of Vitamin D Repletion vs. Deficiency on Myostatin and MuRF1 in Mice
Mice randomly assigned to vitamin D-sufficient diet vs. vitamin D-deficient diet; myostatin and MuRF1 measured at baseline and endpoint; muscle mass quantified via histology.
Longitudinal Cohort Study of Vitamin D Status and Muscle Atrophy Markers in Mice on Defined Diets
Follows a cohort of mice fed defined diets with varying vitamin D levels over 8–12 weeks, measuring serum vitamin D, myostatin, MuRF1, and muscle mass at regular intervals.
Animal Model Study of Vitamin D Deficiency and Upregulation of Catabolic Pathways in Murine Skeletal Muscle
Mice fed vitamin D-deficient diet for 6 weeks; muscle biopsies analyzed for myostatin and MuRF1 mRNA and protein levels via qPCR and Western blot.
In Vitro Study of Vitamin D Supplementation on Myostatin and MuRF1 Expression in Murine Myoblasts
Murine myoblasts treated with varying concentrations of vitamin D; gene and protein expression of myostatin and MuRF1 measured after 24–72 hours.