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SESH INGREDIENT FILE

Serine

INCI Serine

Skin-Identical Amino Acid / Humectant Hydration & Barrier

What it is & what it does

Serine is a skin-identical amino acid and water-binding component used to support skin hydration.
WHAT IT IS: Serine is a skin-relevant amino acid associated with the natural moisturizing factor system and cosmetic conditioning.

HOW IT WORKS / EVIDENCE: Like other skin-identical amino acids, it can help support water balance and surface comfort in a formula. Its role in normal protein biology should not be used to promise that applying it increases dermal collagen or directly reverses age-related changes.

PRACTICAL ROLE: It is best explained as part of a balanced amino-acid and humectant system rather than a stand-alone resurfacing active. The actual finished-product role and supporting evidence govern the claims that can be made.

Usage & cautions

Generally suitable for normal daily skincare; monitor tolerance to the entire formula.
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.