Autophagy: The Body's Cellular Self-Cleaning Protocol
Autophagy — literally 'self-eating' — is the cell's essential quality control mechanism by which damaged organelles, misfolded proteins, and dysfunctional mitochondria are sequestered in double-membrane autophagosomes and delivered to lysosomes for recycling, a process that is fundamental to cancer prevention, neurological health, immune function, and the cellular rejuvenation that drives longevity. Modern lifestyle factors systematically suppress autophagy: chronic mTOR activation from hyperinsulinaemia driven by processed carbohydrate consumption, excessive protein intake, and near-continuous feeding eliminates the cellular fasting signal required to initiate autophagic processes. Environmental toxins including heavy metals impair lysosomal function and disrupt autophagic flux, contributing to the accumulation of the dysfunctional cellular debris — amyloid, alpha-synuclein, tau — that characterises Alzheimer's and Parkinson's disease.