L‐4‐thiazolylalanine (Protinol), a novel non‐proteinogenic amino acid, demonstrates epidermal and dermal efficacy with clinically observable benefits

Objective Facial skin undergoes major structural and functional changes as a result of intrinsic and extrinsic factors. The goal of the current work is to demonstrate L‐4‐thiazolylalaine (L4, Protinol), a non‐proteinogenic amino acid shown to stimulate the production of dermal proteins by fibroblast...

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