Description
Humanin is a 24-amino-acid mitochondrial-derived peptide (MDP) encoded by a small open reading frame in the mitochondrial 16S rRNA gene. Discovered for its ability to protect neurons from amyloid-beta toxicity, it acts primarily as a cytoprotective and anti-apoptotic factor. It binds intracellular proteins (such as Bax) to block cell death and interacts with cell-surface receptors to promote survival under stress (oxidative stress, ischemia, etc.). It also shows metabolic benefits (improved insulin sensitivity) and declines with age.
Comparison with MOTS-c
| Aspect | Humanin | MOTS-c |
|---|---|---|
| Length / Origin | 24 amino acids; encoded in MT-RNR2 (16S rRNA) | 16 amino acids; encoded in MT-RNR1 (12S rRNA) |
| Primary mechanism | Anti-apoptotic (binds Bax and other partners); receptor signaling (STAT3, FPRL receptors) | AMPK activation; nuclear translocation under metabolic stress; folate cycle regulation |
| Main researched effects | Strong neuroprotection, cell survival, cardioprotection, anti-inflammatory | Metabolic regulation (insulin sensitivity, glucose uptake, fat oxidation), exercise-mimetic effects, improved physical performance |
| Best studied for | Neurodegeneration (e.g., Alzheimer’s models), cellular stress resistance | Metabolic health, insulin resistance, aging-related metabolic decline |
| Evidence level | Extensive preclinical; limited human data (mostly correlative circulating levels) | Extensive preclinical; some early human metabolic studies |
| Complementary nature | Focuses on “should the cell live or die” under stress | Focuses on “how the cell uses energy” and metabolic flexibility |
Both are endogenous mitochondrial-derived peptides that decline with age and support cellular resilience. Humanin is stronger in neuroprotection and anti-apoptosis, while MOTS-c is stronger as a metabolic regulator and exercise mimetic via AMPK. They target complementary aspects of mitochondrial and cellular health and are sometimes discussed together in longevity research. Neither is an approved drug.
Current studies of Humanin seem to be focused on aging, neurodegeneration, and metabolic disease. Another promising area is for Macular Degeneration.
Our Humanin comes from Limitless Biotech, and here’s some additional information they provide:
