MOTS-c: The Mouse Data, the One Human Trial, and the 7 to 5 FDA Vote

What does MOTS-c do?

The name is short for a long lab term describing where its gene sits in the mitochondria. It was found in 2015 by Changhan Lee and Pinchas Cohen's group. They showed it is a hormone made from the mitochondria's own DNA that sends signals to the rest of the cell and, in mice, to the whole body. The idea that a mitochondrial gene makes a hormone that controls metabolism was truly new. That is why scientists take MOTS-c more seriously than most peptides sold next to it. Our profile is at MOTS-c.

Is there a human trial of MOTS-c?

The only earlier results in people came from CB4211, a changed version of MOTS-c made by a company called CohBar. It finished an early study in 2021. Liver enzymes went down and there was a small hint of weight loss. After that, the company wound the program down. That tells you something about the pathway. It tells you nothing about the exact peptide sold today. In people, MOTS-c levels in the blood fall with age, are lower in some metabolic diseases and go up in muscle after exercise. Those are links, not proof it does anything as a drug. You can read the study listing at ClinicalTrials.gov NCT07505745.

What people report, and what is unknown

The most common report from people using MOTS-c bought online is raised, itchy welts at the shot spot that can last days. Without testing the product, nobody can tell if that comes from the peptide, from impurities or from leftover germ material. There is no data on long-term use, on how often to take it or on how it mixes with other drugs. Nobody has measured how long it lasts in the human body. Our half-life reference lists it as unknown for that reason.

Two questions come up all the time, and they have the same answer. 'Is MOTS-c the same as BPC-157?' No. They come from different genes, work on different things and neither is approved. 'How long should you take SS-31 before MOTS-c?' No study has tested either order, or the pair. See our SS-31 and elamipretide explainer.

What the mouse studies showed

• In the first paper, in Cell Metabolism, MOTS-c shots stopped mice on a fatty diet from getting fat and from losing their response to insulin. It changed how their muscles burned fuel, through an energy sensor called AMPK and the folate cycle.
• In 2021, Reynolds and colleagues showed MOTS-c doubled how far old mice could run. The same paper found MOTS-c levels rise in human muscle after exercise. That is where the 'exercise in a bottle' label comes from (Nature Communications, 2021).
• A 2026 paper reported that MOTS-c also helps the immune system fight infection (PubMed, 2026). That is a reminder that it does more than affect fat.

Does MOTS-c burn visceral fat?

What did the FDA vote mean?

The FDA's staff paper on MOTS-c is at FDA media 193347. For the whole meeting, including the votes on BPC-157, TB-500, KPV, Epitalon, Semax and DSIP, see our FDA peptide status tracker.