Methionine is vital for synthesizing collagen and other proteins necessary for preserving skin structure. It also facilitates the production of glutathione, a powerful antioxidant that safeguards the skin from harm.
Ahsan, H., Immunopharmacology and immunopathology of peptides and proteins in personal products. J Immunoassay Immunochem, 2019. 40(4): p. 439-447.