Salicylic acid or benzoyl peroxide: which suits your breakouts?
Two common acne ingredients that work in different ways, and how to tell which you need.
· 5 min read · By the Nimaya team
Salicylic acid and benzoyl peroxide are the two acne ingredients you will see most often on pharmacy shelves. Both are well studied and both are sold without a prescription, but they work in different ways and suit different kinds of breakouts.
Salicylic acid: for clogged pores
Salicylic acid is a beta hydroxy acid (BHA). It dissolves in oil, so it can get inside the pore and loosen the plug of oil and dead skin that becomes a blackhead or whitehead. It suits oily skin with blackheads, whiteheads, small bumps and a shiny T-zone. In over-the-counter acne products it is used at 0.5% to 2%.
Benzoyl peroxide: for red, inflamed pimples
Benzoyl peroxide works mainly by killing the bacteria involved in acne, which makes it useful for red, tender, pus-filled pimples. It is sold at 2.5% to 10%. Stronger is not automatically better; lower strengths are often enough and irritate less. It bleaches towels, pillowcases and clothes, so use white fabrics or rinse well.
Which one do you need?
| Your skin | Start with |
|---|---|
| Oily, blackheads and whiteheads, rough bumps | Salicylic acid |
| A few red, sore pimples now and then | Benzoyl peroxide on the spots |
| Both kinds | A salicylic acid wash, plus benzoyl peroxide on spots, started two weeks apart |
| Deep, painful lumps, scarring, or acne affecting your confidence | A dermatologist |
Can you use them together?
Yes, many people do: for example a salicylic acid face wash morning and night, with benzoyl peroxide only on active spots. Together they are more drying, so add one, wait two weeks, then add the other, and use a moisturiser. If skin peels, burns or stays red, cut back.
When to see a dermatologist
Over-the-counter products help mild to moderate acne. See a dermatologist if you have nodules or cysts, if acne is leaving scars or dark marks, or if two months of steady use has not helped. Prescription treatments can work where these cannot.
Sources
- US Code of Federal Regulations, 21 CFR 333.310, topical acne drug products: benzoyl peroxide 2.5 to 10 percent; salicylic acid 0.5 to 2 percent.
- American Academy of Dermatology, “Acne: diagnosis and treatment” and “Acne: tips for managing” (aad.org).
This guide is general skincare information, not medical advice. For severe or persistent acne, see a dermatologist.