Protein consumption is a determining factor in increasing the body's antioxidant capacity, particularly through glutathione synthesis, and an intake of approximately 1.0 g/kg/day is suggested to support this effect.

noli's read

The claim relies on a sound biological mechanism: glutathione is a tripeptide synthesized from three amino acids (cysteine, glutamate, and glycine), making adequate protein intake essential. The mention of the study published in the AJCN in 2024 (American Journal of Clinical Nutrition) points to recent research validating that protein intake influences antioxidant status. It is accurate that proteins are the necessary substrate for these internal defense mechanisms. What is sometimes nuanced in research is the idea that 'increasing' proteins beyond basic needs systematically optimizes antioxidant protection in everyone. The mentioned intake (1.0 g/kg/day) is consistent with general recommendations for metabolic health, but it is worth noting that the diversity of food sources remains crucial. Science therefore confirms the direct link between protein nutrition and endogenous antioxidant synthesis, without, however, making it a miracle solution isolated from other nutrients.

the sources

No named source held this one up — that absence is part of the verdict.