Aminoethanesulfinic Acid
Hypotaurine – amino acid, taurine precursor. In sunscreens works as a secondary antioxidant: stabilizes photo-unstable avobenzone, extending UVA protection duration. Safe, no standalone cosmetic effects.
Evidence by route
Topical application
BLimited evidence. One RCT or several controlled studies with limitations.
Functional sunscreen stabilizer. Works not as a cosmetic active but as a formula adjuvant – protects avobenzone from photodegradation (in vitro data). Safety confirmed.
- Bonda CA, Lott D. Sunscreen photostability. In: Lim HW, Honigsmann H, Hawk JLM, eds. Photodermatology. Informa Healthcare 2007.
Tolerability and safety
Irritation potential
LowAllergen risk
LowPregnancy
SafeSkin types
Suitable for
Frequently asked questions
Is Aminoethanesulfinic Acid safe during pregnancy?
Aminoethanesulfinic Acid is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Aminoethanesulfinic Acid for?
Aminoethanesulfinic Acid suits: normal, dry, combination, oily, sensitive.
What is Aminoethanesulfinic Acid and what does it do in cosmetics?
Hypotaurine – amino acid, taurine precursor.
What's the INCI name for Aminoethanesulfinic Acid?
The INCI name is Aminoethanesulfinic Acid. It may also appear as: Hypotaurine, Гипотаурин, Аминоэтансульфиновая кислота.