What Benzoyl Peroxide does
It releases oxygen radicals into the pore, an environment C. acnes cannot survive in. That makes it one of the fastest-acting acne treatments available without a prescription.
Low strengths work about as well as high ones for most people, with markedly less irritation.
Worth using if…
- Inflamed, pustular acne
- Back and chest breakouts
- Short-course spot treatment
Safety & watch-outs
- It bleaches fabric — expect ruined towels and pillowcases.
- Very drying; pair with a bland moisturiser and don't stack it with acids or retinoids in the same session.
- Store away from heat; degraded product has been the subject of recent stability concerns.
Benzoyl Peroxide in pregnancy: Commonly avoided in pregnancy
Some obstetric guidance permits limited topical use, other sources advise avoiding it. Systemic absorption is low but this is firmly a doctor question.
Comedogenic rating: 0/5 · non-comedogenic
Non-comedogenic. Ratings come from the published Fulton scale, which was measured on rabbit ears rather than human faces — treat it as a rough signal, not a verdict on a finished formula.
Check a whole formula for pore cloggers →Common questions
2.5% or 10%?
2.5% is as effective for most people and far less irritating. 10% mostly buys you peeling.
Informational only, not medical advice. Written from public regulatory and dermatology references (EU Cosmetics Regulation annexes, SCCS opinions, CIR reviews, published Fulton-scale data). Concentration, formula and your own skin all change the outcome — consult a clinician for personal concerns.
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