Evolution's ancient answer to the oxidative chaos of making ATP — power plants, longevity signaling, and tissue-wide antioxidant roles.
In the intro clip, Dr. John Lieurance, ND, DC — citing Dr. Russell J. Reiter — characterizes melatonin’s antioxidant roles across blood, brain, eyes, and gut. Reiter’s published field maps local synthesis inside mitochondria where oxidative stress peaks. More Lieurance interviews: Expert Voices.
Mitochondria generate reactive oxygen species (ROS) as exhaust during oxidative phosphorylation — the dangerous work of ATP synthesis. Endogenous melatonin, synthesized inside mitochondria, directly scavenges these free radicals and stabilizes membrane lipids. When night shift and artificial light suppress your melatonin signaling, you're running cellular power plants with weakened native fire suppression.
Melatonin and metabolites (AFMK, AMK) are potent ROS/RNS scavengers at concentrations far exceeding plasma levels inside mitochondria — the primary site of cellular oxidative stress.
Research links melatonin to mitochondrial membrane stabilization, electron transport efficiency, PGC-1α biogenesis, and SIRT3 — core longevity signaling explored in model organisms (+10% worms, +6% flies on pump.science).
Mitochondria produce water as ATP byproduct. Melatonin is the antioxidant they manufacture to survive the process. High-dose melatonin research explores restoring that quenching capacity systemically — a hypothesis, not a prescription. Read the mitochondria essay →