The pore-clearing acid — oil-soluble, so it exfoliates inside the pore where breakouts start.
Unlike water-soluble AHAs, salicylic acid dissolves in oil, letting it travel into the pore lining, dissolve the dead-cell/sebum plugs that become comedones, and calm inflammation (it's chemically related to aspirin).
0.5–2% is the studied and (in the US) FDA-monograph range for acne.
Decades of use, FDA-recognized, moderate trial base
Salicylic acid 0.5–2% is an FDA OTC-monograph acne ingredient — a regulatory recognition of efficacy — and controlled trials show reduced comedones and mild-to-moderate breakouts over 8–12 weeks. Head-to-head, it's gentler but somewhat weaker than benzoyl peroxide for inflamed acne.
The best-supported ingredient for visible pore congestion
By clearing the plugs that stretch pores, 2% salicylic acid measurably reduced visible pore area in controlled studies over 4–8 weeks. It won't shrink pore structure — nothing does — but it makes them noticeably less prominent.
Anchored to regulatory assessments — not hazard lists. Dose makes the poison; these are the conclusions at real-world cosmetic use.
FDA-recognized OTC acne active at 0.5–2%. Avoid large-area use in children and be cautious combining with other exfoliants; dryness and peeling are the common side effects.
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