MOTS-c for Muscle Growth: What the Evidence Shows
What human and animal studies show about MOTS-c for muscle growth, how strong that evidence is, and what is still unproven.
- Strongest evidence
- Human RCT
- Human studies
- 6
- PubMed records, our ledger
- Animal studies
- 2
- PubMed records, our ledger
- Studies we summarised
- 4
- with an outcome for muscle growth
Evidence for muscle growth
Each row is an outcome related to muscle growth from a published study, strongest design first. Animal and cell results are labelled and are not human results. User reports are not counted as evidence here.
| Outcome | Result | Study type | Source |
|---|---|---|---|
| Circulating MOTS-c with heat | Repeated heat treatment increased circulating MOTS-c (P = 0.033) and lowered muscle FGF21 (P = 0.027). | Human RCTn = 19 | Medicine and science in sports and exercise 2025, PMID 40674654 |
| MOTS-c and body composition (association) | Post-exercise MOTS-c levels were associated with lower fat mass, body weight, HOMA-IR and CRP and higher lean mass in non-Hispanic White survivors (association, not a treatment effect). | Human RCTn = 49 | Scientific reports 2021, PMID 34413391 |
| Immobilization-induced muscle loss | Immobilization reduced muscle mass by about 15%; MOTS-c attenuated this to a 5% reduction in mice. | Animal · mouse (not a human result) | American journal of physiology. Endocrinology and metabolism 2024, PMID 38170165 |
| Myostatin and muscle atrophy signalling | MOTS-c prevented palmitic acid-induced atrophy in C2C12 myotubes and decreased plasma myostatin in diet-induced obese mice. | Animal · mouse (plus C2C12 myotubes and human plasma) (not a human result) | American journal of physiology. Endocrinology and metabolism 2021, PMID 33554779 |
PubMed records for MOTS-c and muscle growth: 6 human, 2 animal (search counts, not studies we reviewed). Grades follow our evidence scale.
How strong is it?
A human randomized trial outweighs any number of animal studies. Animal and cell results show a mechanism worth testing, not that it works in people.
Other peptides people research for muscle growth
All peptides for muscle growth, comparedCommon questions
Does MOTS-c help with muscle growth?
The strongest study we summarise for muscle growth is human rct evidence, across 4 studies with an outcome for muscle growth. A trial result is not an approval; see the legal status.
Is MOTS-c approved for muscle growth?
No. MOTS-c is not FDA approved for any use, including muscle growth.
What is the best peptide for muscle growth?
There is no single answer. Our muscle growth overview compares each candidate by evidence grade and legal status rather than by popularity.
More on MOTS-c
Sources
- 1Repeated Heat Stress Modulates the Levels of the Mitokines MOTS-C and FGF21 in Active Men during Calf Muscle Immobilization.Medicine and science in sports and exercise · 2025PMID 40674654Accessed 2 Oct 2026
- 2Effect of aerobic and resistance exercise on the mitochondrial peptide MOTS-c in Hispanic and Non-Hispanic White breast cancer survivors.Scientific reports · 2021PMID 34413391Accessed 2 Oct 2026
- 3Mitochondrial-derived microprotein MOTS-c attenuates immobilization-induced skeletal muscle atrophy by suppressing lipid infiltration.American journal of physiology. Endocrinology and metabolism · 2024PMID 38170165Accessed 2 Oct 2026
- 4MOTS-c reduces myostatin and muscle atrophy signaling.American journal of physiology. Endocrinology and metabolism · 2021PMID 33554779Accessed 2 Oct 2026
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