MOTS-c

What it is

MOTS-c is a mitochondrial-derived peptide, meaning it is encoded within mitochondrial DNA rather than the cell's main nuclear DNA, that acts as a metabolic regulator. It is studied for improving insulin sensitivity, metabolic flexibility, and exercise capacity, and is sometimes described as an "exercise mimetic" because some of its studied effects resemble those associated with physical exertion. Unlike many peptides discussed on this site, MOTS-c originates from the mitochondrial genome rather than being a synthetic copy of a hormone or hormone fragment, which is part of why it is described as a distinct class of metabolic signal.

In the PeptidesAI encyclopedia it is categorized under both immune and longevity and weight management, reflecting its studied role at the intersection of metabolism and cellular aging.

How it's thought to work

Under metabolic stress, MOTS-c is studied for translocating to the cell nucleus and activating AMPK signaling, a pathway involved in energy regulation, which research describes as enhancing glucose utilization, fatty acid metabolism, and the cell's resistance to stress. This nuclear translocation under stress is described as a distinguishing feature of MOTS-c compared with hormone-based peptides, since it is framed as an internal cellular signal rather than a receptor-binding hormone analog.

What the research says

Preclinical studies show improved insulin sensitivity and exercise capacity associated with MOTS-c, and declining MOTS-c levels have been observed to correlate with aging. Human trials remain at an early stage, and MOTS-c is not FDA-approved.

Reported side effects

Early reports describe MOTS-c as generally well-tolerated. Injection site reactions have been noted, and long-term human data remains limited, so a complete picture of its safety profile is still developing. No serious safety signals are described in the available material.

Reconstitution

MOTS-c is supplied as a lyophilized (freeze-dried) powder and is typically reconstituted with bacteriostatic (BAC) water before use. It commonly comes in 5 mg and 10 mg vials. The amount of peptide in the vial is fixed; the water added only changes how concentrated the solution is.

Worked example. A 10 mg vial is 10,000 mcg. Reconstituted with 2 mL of BAC water, that works out to 10,000 mcg ÷ 2 mL = 5,000 mcg/mL. On a U-100 insulin syringe, where each unit is 0.01 mL, each unit holds 5,000 × 0.01 = 50 mcg. Use the peptide reconstitution calculator to work out the concentration and units for any vial size and water volume.

Important notes

MOTS-c is described as an early-stage research compound; it is not approved by the FDA for any human use, and the human research base behind it is still developing relative to more established peptides. As with other early-stage compounds on this site, the gap between laboratory findings and confirmed human outcomes should be kept in mind when evaluating any claims made about it.

Frequently asked questions

These questions cover the same ground as the sections above, in a shorter format.

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