Humanin is a naturally occurring micro-peptide located in the mitochondria, where it plays a critical role in cellular protection. It is best known for its ability to prevent apoptosis (programmed cell death), helping to preserve cell viability under stress. As one of the few compounds that directly influence mitochondrial function, Humanin supports improved energy efficiency and cellular homeostasis. Ongoing research suggests it may have therapeutic potential in preventing or mitigating diseases of the heart, eyes, brain, and skeletal muscles.