OriginDerived from the amino acid L-cysteine, a sulfur-containing compound from the amino acid family. Synthesized through fermentation of bacteria or chemical extraction, then converted to the hydrochloride salt form.
Cysteine hydrochloride
Formula
C3H8ClNO2S
Mol. Weight
157.62
CAS #
52-89-1
Form
Powder
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Antioxidant
Fights free radicals — the unstable molecules from UV, pollution, and stress that break down collagen and cause premature aging.
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Hair Waving Or Straightening
Reducing
Neutralizes Free Radicals
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
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