“Sugar is the main driver of aging”

## What Is True Chronically elevated blood glucose accelerates protein glycation, forming AGEs that accumulate in collagen, blood vessel walls, and neural tissue — contributing to vascular stiffness, skin aging, and neurodegeneration. High insulin levels promote mTOR activation and suppress autophagy, both of which accelerate cellular aging. Hyperglycaemia is a well-established driver of accelerated biological aging. ## What's Oversimplified The "sugar causes aging" narrative often conflates added sugar with carbohydrates broadly. Whole food carbohydrates (legumes, vegetables, fruits) have different metabolic profiles from refined sugar and are not aging accelerants. Moreover, the major pathways of aging (DNA damage, mitochondrial dysfunction, cellular senescence, telomere attrition, loss of proteostasis) are not primarily glucose-driven. ## The Nuance Added sugar (sucrose, HFCS) in excess contributes meaningfully to metabolic aging, fat accumulation, insulin resistance, and chronic inflammation. Reducing it matters. But optimising total caloric intake, avoiding ultra-processed foods broadly, exercising, and sleeping well have larger and better-evidenced effects.