Vitamin C extends primate lifespan by blocking iron-driven lipid damage

A landmark study in Cell Metabolism reports that vitamin C supplementation slows aging in primates by preventing iron-catalyzed lipid peroxidation—the same damaging process underlying ferroptosis. As organisms age, iron accumulates in tissues, promoting oxidative damage to lipid membranes. The researchers found that vitamin C, a potent antioxidant, directly counteracts this process and extends primate lifespan, providing rare experimental evidence in a species closely related to humans. This complements the ferroptosis-senescence findings (candidate 30) by highlighting how antioxidants might protect against the same iron-lipid damage that can be exploited to kill senescent cells. The primate model is particularly significant because aging mechanisms often differ between rodents and primates, making these results more translatable to humans. While observational human studies on vitamin C and longevity have been mixed, this mechanistic work in primates suggests optimizing antioxidant status—especially in the context of iron metabolism—may be genuinely protective. The findings underscore that simple nutritional interventions, properly targeted, might still have meaningful impacts on healthspan.