Humanin Guide

Humanin was discovered in 2001 by Dr. Ikuo Nishimoto at Keio University School of Medicine when he found that a peptide encoded in the mitochondrial 16S ribosomal RNA gene rescued neurons from Alzheimer's disease-related apoptosis in cell culture. This was a landmark discovery — demonstrating that the mitochondrial genome produces bioactive peptides with systemic functions beyond energy production.

Humanin is a 21-amino-acid peptide that is secreted from mitochondria and acts both intracellularly (blocking pro-apoptotic proteins BAX and BID) and extracellularly (binding cell surface receptors including the CNTFR-α/WSX-1/gp130 heterotrimeric receptor complex to activate STAT3). This dual intracellular-extracellular mechanism explains its broad protective effects across multiple tissues.

Crucially, Humanin circulates in the bloodstream at measurable levels — and these levels decline with age. A 2020 study found that centenarians (people 100+ years old) and their offspring had significantly higher plasma Humanin levels than age-matched controls, suggesting Humanin is a marker and possibly mediator of exceptional longevity. This association has made Humanin supplementation an active area of anti-aging research.