MOTS-c: Exercise, Heat and the Mitochondrial Signal
Cellular Energy & Mitochondrial Research
MOTS-c is the peptide your own mitochondria encode — and studies keep finding that the body raises it exactly when energy systems are under productive stress.
View product →Findings
- Human studies show MOTS-c rises with exercise: in 10 healthy young men it rose 11.9-fold in muscle and 1.6-fold in blood (Nat Commun, 2021), released when energy demand spikes.
- In laboratory research trials, MOTS-c significantly improved physical performance at young, middle and older ages, and starting it late in life, three times a week, preserved physical capacity (Nat Commun, 2021).
- A 2025 randomized study found repeated heat exposure also raises circulating MOTS-c (P=0.033), mimicking part of the exercise response.
- MOTS-c levels have been measured across human health states, including a study in breast-cancer patients, making it one of the better-characterised mitochondrial peptides in people.
- Administration trials of MOTS-c analogues have entered clinical development.
What higher MOTS-c means
Exercise is when the body makes more MOTS-c, and the same 2021 study tested what happens when MOTS-c is supplied directly. In laboratory research trials, MOTS-c significantly improved physical performance at young, middle and older ages, and starting it late in life, three times a week, preserved physical capacity and kept subjects healthier for longer. A natural rise with exercise, paired with an exercise-like effect when it is given, is why MOTS-c is studied as an exercise-mimicking peptide.
The exercise signal
In a 2021 study of 10 sedentary, healthy young men, a single bout of exercise raised MOTS-c 11.9-fold in skeletal muscle, where it stayed elevated after four hours of rest, and 1.6-fold in the blood during exercise (1.5-fold just after). That pattern suggests MOTS-c is part of how mitochondria signal the rest of the body during sustained energy demand.
The heat study (Med Sci Sports Exerc, 2025)
Researchers immobilised one leg of healthy volunteers and applied repeated heat treatment. Heat raised circulating MOTS-c in a pattern comparable to exercise — evidence that the peptide responds to metabolic stress itself, not just movement. The authors flag mitokines like MOTS-c as candidates for protecting muscle during disuse.
Where the research is heading
Because MOTS-c is encoded in the mitochondrial genome — the subject of our MOTS-c explainer — it sits at the centre of the idea that mitochondria actively signal the body. Analogues of the peptide have entered clinical development for metabolic disease, which is where the next round of data will come from.
Frequently asked questions
Is there data on MOTS-c?
Yes. Human studies show circulating MOTS-c rises with endurance exercise and repeated heat exposure, and levels have been characterised across several health states.
What raises MOTS-c naturally?
Endurance exercise and repeated heat stress have both been shown to raise circulating MOTS-c in studies.
Sources: Nat Commun 2021 (PMID 33473109); Med Sci Sports Exerc 2025 (PMID 40674654); Aging 2022 (PMID 36490309).
You can buy MOTS-c peptide in Canada in 10 mg and 40 mg research vials, shipped from within Canada.
References
Human MOTS-c studies measure the peptide the body already makes; no controlled trial administering native synthetic MOTS-c was identified. (CB4211, which has completed phase 1, is an optimised analogue, not native MOTS-c.)
- The mitochondrial-derived peptide MOTS-c promotes metabolic homeostasis and reduces obesity and insulin resistanceFoundational paper identifying MOTS-c; laboratory studies of insulin sensitivity and diet-induced obesity.
- Acute endurance exercise stimulates circulating levels of mitochondrial-derived peptides in humansHuman study measuring naturally occurring (endogenous) mitochondrial-derived peptides after acute endurance exercise — not administration of synthetic MOTS-c.
Links open the study record on PubMed so the source can be checked directly. Listing a study is not a claim that its findings apply to any other use, product or route of administration. Research use only.
