Betaine Salicylate

Betaine salicylate is a salicylate-based exfoliant (BHA alternative) typically used around 1–4% in leave-on products, delivering keratolytic activity that can disrupt the stratum corneum barrier. While often marketed as “gentler” than salicylic acid, clinical experience and irritant-pattern data for salicylates still show meaningful risk of stinging, dryness, and eczema flares, especially when layered with other actives or used on compromised skin. Given its active, barrier-altering mechanism and common routine-level cumulative irritation, it warrants careful introduction in sensitive populations. Safety Notes: In commercial consumer products, betaine salicylate is most often used as a BHA source at low levels (~0.1–1%) in gentle leave-on toners/essences and some rinse-off cleansers where it functions as a milder salicylate alternative. High-strength OTC formulations (primarily leave-on serums/peels marketed for acne/texture) commonly reach 4–6%, with a small number of consumer-available products observed up to about 8% (often positioned as “2% salicylic acid equivalent” and dependent on pH/vehicle). There is no specific global positive-list maximum for betaine salicylate itself, but salicylate safety/labeling expectations and irritation limits tend to constrain practical use, especially in leave-on products.

Suitability