INCI: Cysteamine Hydrochloride
Antioxidant and melanin degrader, a hydroquinone alternative for stubborn melasma. The main practical downside is a sharp unpleasant odor.
Topical application
BLimited evidence. One RCT or several controlled studies with limitations.
Double-blind RCTs show comparable efficacy to hydroquinone 4% in melasma. Slight stinging on skin but without ochronosis risk.
Irritation potential
MediumAllergen risk
LowPregnancy
CautionSuitable for
Use with caution
Cysteamine should be used with caution during pregnancy. Consulting a dermatologist or OB-GYN is advisable.
Cysteamine suits: normal, oily, combination. Use with caution in: sensitive.
Cysteamine has moderate irritation potential. Sensitive skin may show a transient reaction that usually settles with adaptation.
Antioxidant and melanin degrader, a hydroquinone alternative for stubborn melasma.
The INCI name is Cysteamine Hydrochloride. It may also appear as: Cysteamine.
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