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What is MOTS-c?
MOTS-c is a naturally occurring protein hormone and experimental therapeutic peptide composed of 16 amino acids. Its name is short for “mitochondrial ORF of the 12S rRNA type-C,” which refers to the peptide’s origin, as it’s derived from lengths of DNA called short open reading frames (ORFs) found in the 12S rRNA region of mitochondrial DNA.
Current therapeutic uses for MOTS-c
With its combined effects on cellular metabolism, stress response, and longevity, MOTS-c has many of the same therapeutic uses as growth hormone secretagogues (substances that stimulate growth hormone secretion) such as CJC-1295, ipamorelin, and tesamorelin.
Improved metabolic function
MOTS-c activates a pathway called AMPK that stimulates glucose uptake. Glucose is a sugar derived from carbohydrates in the foods you eat, and your glucose levels are regulated by insulin. Your cells need glucose for energy, but having too much of it can overwhelm your body’s insulin response and lead to diabetes.
However, with MOTS-c circulating in high concentrations, not only can your cells use glucose more efficiently, but your body can more effectively modulate insulin action.
Reduced body fat
Considering the effects that MOTS-c has on insulin response and glucose uptake — two factors associated with weight gain — the authors of the 2015 paper referenced above also examined the peptide’s potential for preventing obesity.
Improved physical performance
Recall that endogenous MOTS-c can be activated by exercise, allowing your skeletal muscles to use glucose for energy to meet their high energy demand.
Bone growth
“MOTS-c promotes osteoblast proliferation, differentiation, and mineralization,” say the authors of a 2023 review. Osteoblasts, by the way, are cells that both form new bones and heal existing ones — the more of them you have, the stronger and denser your bones are likely to be. So MOTS-c’s osteoblast-promoting action is great news for anyone at high risk of developing osteoporosis, such as postmenopausal women.
Quality of life
Each of the health concerns we’ve addressed here — metabolic dysfunction, increased body fat, decreased physical capacity, increased inflammation, and reduced bone density — often correlates with advanced age, so it follows that attenuating these factors would result in a more robust and enjoyable aging experience.
References
How does MOTS-c work?
As a naturally occurring protein hormone, MOTS-c is primarily activated by exercise or some type of stress, whereupon it translocates to the cell’s nucleus and mediates mitochondrial-nuclear communication. This crosstalk is crucial for coordinating the many mitochondrial functions and maintaining homeostasis. MOTS-c also activates the AMP-activated protein kinase (AMPK) pathway, a key regulator of cellular metabolism and homeostasis that helps produce energy by stimulating glucose uptake and fat oxidation. Much of this activity takes place in the skeletal muscles, which are rich in mitochondria because of their high energy demand.
Over time, MOTS-c loses influence because its concentration declines with age. Consequently, people can become increasingly susceptible to some of the health conditions we’ve mentioned, many of which you may have noticed are largely age-correlated.
But as a therapeutic peptide, MOTS-c is supplemental: it fills the vacancy that develops over time and ensures healthy ongoing interrelations in the body’s biochemistry.
Dosing, administration and protocol
A dose of MOTS-c ought to start around 5mg per injection.
Injections are self-administered and subcutaneous (i.e., into a fatty area such as a thigh, an upper arm, or the belly).
MOTS-c is often a twice-weekly treatment, which seems more easily manageable than the near-daily injections you’d undergo with other peptides, like CJC-1295. The time of day doesn’t matter necessarily, but a morning injection would allow you to take advantage of MOTS-c’s potentially energizing effects (and avoid an energy boost when you’re heading to bed).
You may begin to feel the benefits of your treatment in as little as 1-2 weeks, as your improved metabolism and mitochondrial function lead to higher energy levels. Weeks 4-6 are when you might notice improvements in physical performance, such as increased stamina and endurance. Meanwhile, reduced inflammation may allow you to experience a general boost in your physical and mental well-being.
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National Human Genome Research Institute. (2025). Open reading frame. NHGRI.
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Mohtashami, Z., et al. (2023). Mitochondrial open reading frame of the 12S rRNA type-c: Potential therapeutic candidate in retinal diseases. Antioxidants, 12(2), 518.
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Anderson, A. J., et al. (2019). Mitochondria — hubs for regulating cellular biochemistry: Emerging concepts and networks. Open Biology, 9(8), 190126.
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Forum on Neuroscience and Nervous System Disorders. (2013). Neurodegeneration: Exploring commonalities across diseases: Workshop summary. Board on Health Sciences Policy.
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National Human Genome Research Institute. (2020). Deoxyribonucleic acid (DNA) fact sheet. NHGRI.
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Catic, A. (2018). Cellular metabolism and aging. Progress in Molecular Biology and Translational Science, 155, 85-107.
MOTS-c
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