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Increased constitutive c-Jun N-terminal kinase signaling in mice lacking glutathione S-transferase Pi

A semi-essential (infants cannot synthesize it, but adults can) amino acid that is one of the primary building blocks of hair keratin and skin collagen

Anti-aging peptides beyond the copper family include matrixyl, argireline, and palmitoyl tripeptides that stimulate collagen without involving copper metabolism

Anyone tempted to notice that 2 mg is reassuringly close to the communitys 1.7 mg figure should notice instead that a rodent wound-chamber method is not a dose-finding study, and that the resemblance is a coincidence of scale rather than a validation