Product · Active · BHA
P. 25 · REVIEWPaula's Choice · Actives
the reference exfoliant.
The reference 2% salicylic acid leave-on. Correctly buffered to pH 3.2-4.0, lightweight, fragrance-free, with a 25-year reformulation history. Every other BHA is judged against this one.
— § 01
— § 02
— § 03
Daily PM, alternate with retinoid until tolerated, then layer.
Body application: arms, thighs. Most effective ingredient short of Rx.
Reduces sebum film; pores read smaller within 4-6 weeks.
— § 04
78⁄100
Half the price; slightly thicker vehicle.
72⁄100
Betaine salicylate; slightly weaker than true SA.
75⁄100
Aqueous version; good budget alternative.
— Cross-references
Routines that include it
— § 05
Most skin tolerates daily after a 2-week ramp. Start every other night, increase as tolerated. Daily is the goal — sporadic use gives sporadic results.
On most adult skin, no — buffer with a moisturiser between. On sensitised skin, alternate nights instead.
Most dermatology guidelines advise stopping leave-on SA in pregnancy. Switch to azelaic acid or glycolic acid as a milder alternate.
Marginally — better vehicle, smoother finish, more research bandwidth behind the brand. The Inkey delivers 90% of the benefit at 50% of the price. Either is a reasonable choice.
— § 06