Proline is a skin-identical amino acid and one of the amino acids found in collagen-rich structural proteins.
Topically it contributes to hydration and conditioning as part of the skin’s amino-acid pool, supporting softness, flexibility and the hydrated surface environment.
Information approach
Consumer-friendly summaries are informed by established cosmetic ingredient references such as INCIDecoder and Paula’s Choice Ingredient Dictionary, while avoiding turning ingredient-level evidence into medical claims about the finished product.
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