Feb 18, 2026Vitamin C: Immune Function, Collagen Synthesis, Antioxidant Evidence, and Megadose ClaimsVitamin C is essential for collagen hydroxylation, neutrophil function, and regeneration of other antioxidants including vitamin E. Deficiency is common in older adults and smokers. Supplementation shortens cold duration modestly; megadose claims for cancer and longevity are not supported by RCT evidence.
Feb 8, 2026The Antioxidant Network: Vitamin C, E, Glutathione, and Astaxanthin — Recycling and SynergiesAntioxidants function as a network, recycling each other rather than acting independently. Vitamin C regenerates vitamin E. Glutathione regenerates both. Astaxanthin provides singlet oxygen quenching in lipid membranes. Understanding the network prevents both under-dosing and counterproductive over-supplementation.