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Betaine Salicylate

Betaine SalicylateExfoliant

A gentler beta-hydroxy exfoliant common in K-beauty — a salicylic-acid-and-betaine pairing that behaves like a milder BHA.

What it does

Betaine salicylate combines salicylic acid with betaine, an amino-acid-derived humectant. On the skin it behaves as a beta-hydroxy acid: oil-soluble, so it can work inside the pore to loosen the dead-cell and sebum buildup behind clogged pores and blackheads. It is popular in Korean formulations as a milder route to BHA exfoliation — a given percentage of betaine salicylate delivers less free salicylic acid than the same percentage of straight salicylic acid, so it tends to read as gentler on the label, with roughly 4% betaine salicylate often positioned around a 2% salicylic acid experience. Unlike the cosmetic ester salicylates (butyloctyl, ethylhexyl, benzyl), this one is a genuine exfoliant.

The evidence, graded

expert consensusTopical salicylic acid at 2% or below is generally considered safe in pregnancy when used on small areas. Higher concentrations, large-area or under-occlusion use, and oral salicylates should be avoided.Bozzo 2011 · Canadian Family Physician ↗
expert consensusDuring an active eczema flare, most actives (retinoids, AHAs, BHAs, vitamin C) can worsen barrier dysfunction and prolong the flare. Focus on barrier repair until the skin is calm; consult a derm if flares are recurrent.Eichenfield 2014 · Journal of the American Academy of Dermatology ↗
expert consensusIf skin is reactive, peeling, stinging, or burning unexpectedly, pause all actives and rebuild the barrier with simple cleanser, ceramide-rich moisturizer, and SPF for 2–4 weeks before re-introducing actives one at a time.Lodén 2003 · American Journal of Clinical Dermatology ↗

Graded per the methodology: strong · moderate · emerging · expert consensus. A weak source on a strong claim gets the weaker label.

Also known as

bha (betaine salicylate)

Pairs worth knowing

Niacinamide (Vitamin B3) · works together ↗Panthenol (Pro-vitamin B5) · works together ↗Centella Asiatica (Cica) · works together ↗

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