Ingredient

Cysteine

Low risk

FunctionAmino Acid

What it is — Cysteine (INCI: Cysteine) is a sulfur-containing amino acid used as a conditioning ingredient for hair and skin.

What it does — It is commonly used to help condition the surface and support the skin and hair's natural moisture balance; its sulfur chemistry also makes it a familiar building block in hair-fiber care.

Typical use — Found in conditioners, hair treatments, essences and moisturizers as a supporting amino acid.

Who it suits / good to know — Generally suitable across skin and hair types and easy to combine with other amino acids and humectants. Benefits are supportive and cosmetic.

Safety — Graded low risk; a skin- and hair-familiar amino acid that is typically gentle. This is general information, not medical advice. Patch-test if your skin reacts easily.

Cross-reference

Found in these DHALIORA products

Found in 0 DHALIORA products

Not currently in any DHALIORA product.

How grades are set — Risk reflects our own reading of publicly available safety data, an EWG-style reading shown at the worst-case grade we've assigned this ingredient across products. It isn't a third party's proprietary score, and it isn't medical advice. Always read the packaging and patch-test where indicated.
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