What Is Humanin? Benefits, Research & Safety

Humanin was discovered in 2001 by Yuichi Hashimoto and colleagues at the National Institute for Longevity Sciences in Japan. They used a functional expression screening approach to identify factors that could protect neurons from toxicity induced by familial Alzheimer's disease mutant proteins. The surprising finding was that this protective factor was encoded by the mitochondrial genome—an unprecedented discovery that expanded understanding of mitochondrial biology. The peptide was named "humanin" for its potential to benefit human health. Subsequent research revealed that humanin circulated in blood and cerebrospinal fluid, suggesting endocrine-like functions. Studies showed that circulating humanin levels correlated inversely with age and various age-related diseases. The discovery of humanin, along with MOTS-c (identified in 2015), established the concept of mitochondrial-derived peptides as a new class of signaling molecules with systemic effects on metabolism, stress responses, and ageing. Synthetic analogues, particularly HNG (with a serine-to-glycine substitution at position 14), were developed to enhance potency and stability for research applications.