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How MOTS-c Works: Mechanism and Pharmacology

How MOTS-c works: its target and mechanism as the sources state them, how long it acts, and what is still unknown.

Medical review pendingMitochondrial-derived peptideUpdated
Class
Mitochondrial-derived peptide
FDA status
Not approved
Off Category 2, 15 Apr 2026
Routes studied
not stated; injection; cell culture
Half-life
[pending]
by route, with source

How long it acts

No published half-life found for MOTS-c (PubMed search, 11 Oct 2026)

Full detail, including drug-testing windows, is on the MOTS-c half-life page.

What MOTS-c is and where it acts

MOTS-c is a 16-amino-acid peptide encoded in the mitochondrial 12S rRNA gene; its primary target organ appears to be skeletal muscle.[7]

In cells, it inhibits the folate cycle and its linked purine biosynthesis, which leads to AMPK activation.[7]

A review of its mechanism describes insulin sensitisation, enhanced glucose use and targeting of the folate-AICAR-AMPK pathway.[8]

What it did downstream (animals and cells)

Treated mice were protected from insulin resistance caused by ageing or a high-fat diet, and from diet-induced obesity.[7]

In non-obese diabetic mice, MOTS-c modulated T cell function by regulating TCR/mTORC1 signalling.[9]

In muscle cells and obese mice, MOTS-c lowered myostatin, acting through AKT phosphorylation and inhibition of the FOXO1 transcription factor.[10]

In immobilised mice, MOTS-c at 15 mg/kg/day limited muscle loss to about 5% against about 15% in untreated immobilised mice, an animal result.[11]

What has been measured in people

In humans, exercise induces endogenous MOTS-c expression in skeletal muscle and in circulation.[12]

In a human study, acute endurance exercise only showed a trend towards raising circulating MOTS-c.[13]

In people with type 1 diabetes, serum MOTS-c was lower than in healthy controls.[9]

In breast cancer patients, circulating MOTS-c did not change significantly with 24 weeks of chemotherapy with or without metformin.[8]

Related peptides

MOTS-c vs TesamorelinGHRH analogMOTS-c vs SS-31Mitochondria-targeting peptideMOTS-c vs SLU-PP-332ERR agonist (not a peptide)MOTS-c vs RetatrutideGLP-1 / GIP / glucagon triple agonist

Common questions

How long does MOTS-c act in the body?

We found no published half-life for MOTS-c (PubMed search, 11 Oct 2026), so how long it acts is unknown.

How does MOTS-c work?

Through the folate cycle, purine synthesis and AMPK activation, shown in cells and mice.[7]

How long for MOTS-c to work?

No cited study reports a time to effect in people; the human papers measured the body's own MOTS-c, not treatment.[13]

More on MOTS-c

DosageDoses used in published studies, with the source for each.CalculatorVial, water and dose to syringe units.Side effectsWhat labels and studies report, and what is unknown.ResultsStudy outcomes and when they were measured.PricePrice per mg and per week from dated listings. No vendor links.BenefitsClaimed benefits next to what published studies measured.

Sources

  1. 1PubMed search: ("MOTS-c"[tiab] OR MOTSc[tiab]) (262 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  2. 2PubMed search: ("MOTS-c"[tiab] OR MOTSc[tiab]) AND (humans[mh] OR human[tiab] OR participants[tiab] OR patients[tiab] OR volunteers[tiab]) (179 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  3. 3PubMed search: ("MOTS-c"[tiab] OR MOTSc[tiab]) AND (randomized controlled trial[pt] OR "clinical trial"[pt] OR "meta-analysis"[pt] OR "systematic review"[pt]) (5 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  4. 4PubMed search: ("MOTS-c"[tiab] OR MOTSc[tiab]) AND (mice[tiab] OR mouse[tiab] OR rat[tiab] OR rats[tiab]) AND (injection[tiab] OR treatment[tiab] OR administration[tiab] OR treated[tiab]) (72 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  5. 5PubMed search: ("MOTS-c"[tiab] OR MOTSc[tiab]) AND (half-life[tiab] OR pharmacokinetic*[tiab]) (3 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  6. 6PubMed search: ("MOTS-c"[tiab] OR MOTSc[tiab] OR CB4211[tiab]) AND (adverse[tiab] OR "side effect*"[tiab] OR safety[tiab] OR tolerab*[tiab] OR toxicity[tiab] OR "case report"[pt]) (20 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 11 Oct 2026
  7. 7The mitochondrial-derived peptide MOTS-c promotes metabolic homeostasis and reduces obesity and insulin resistance.Cell metabolism · 2015PMID 25738459Accessed 2 Oct 2026
  8. 8Circulating levels of MOTS-c in patients with breast cancer treated with metformin.Aging · 2022PMID 36490309Accessed 2 Oct 2026
  9. 9Mitochondrial-encoded MOTS-c prevents pancreatic islet destruction in autoimmune diabetes.Cell reports · 2021PMID 34320351Accessed 2 Oct 2026
  10. 10MOTS-c reduces myostatin and muscle atrophy signaling.American journal of physiology. Endocrinology and metabolism · 2021PMID 33554779Accessed 2 Oct 2026
  11. 11Mitochondrial-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
  12. 12MOTS-c is an exercise-induced mitochondrial-encoded regulator of age-dependent physical decline and muscle homeostasis.Nature communications · 2021PMID 33473109Accessed 2 Oct 2026
  13. 13Acute endurance exercise stimulates circulating levels of mitochondrial-derived peptides in humans.Journal of applied physiology (Bethesda, Md. : 1985) · 2021PMID 34351816Accessed 2 Oct 2026

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