What is benzoyl peroxide in skincare?
Benzoyl peroxide is an organic peroxide used topically for acne. It releases oxygen into the follicle, which kills Cutibacterium acnes – the bacterium that drives inflammatory breakouts – and mildly loosens the plug of dead cells at the same time.
Its great advantage is that bacteria do not develop resistance to it, unlike topical antibiotics. Over-the-counter strengths run from 2.5% to 10%.
What skin concerns does benzoyl peroxide treat?
It is most effective on inflammatory acne – red papules and pustules – and less so on plain blackheads, where salicylic acid or a retinoid does more.
Trial evidence is consistent, and importantly shows 2.5% works about as well as 10% with considerably less dryness and irritation. Starting low is genuinely the better strategy, not a compromise.
What ingredients are best paired with benzoyl peroxide?
Niacinamide, hyaluronic acid, ceramides and squalane offset the dryness it causes. Using it as a short-contact wash – applied, left five minutes, rinsed – gives most of the benefit with far less irritation.
Keep it away from retinoids and vitamin C in the same application, since it can oxidise them; use one in the morning and the other at night. It bleaches fabric, so expect marks on towels and pillowcases. Take our Skin Quiz.
What is bumpy skin?
Bumpy skin is a texture problem rather than a single condition. It covers the rough, uneven surface you can feel more than see – most often keratosis pilaris (small hard bumps on the upper arms, thighs and cheeks), closed comedones, milia, or simple build-up of dead cells on the surface.
Keratosis pilaris in particular affects a large share of the population and is harmless, but it makes skin feel like sandpaper and can be stubborn to smooth out.
What causes bumpy skin?
Most bumpy texture comes from keratin plugging the follicle. When dead cells fail to shed cleanly, they collect at the pore opening and form a firm bump – a process closely linked to a weakened permeability barrier and low skin hydration.
Genetics, dry skin, cold weather, eczema and a history of over-scrubbing all make it worse. Aggressive physical exfoliation tends to backfire, inflaming the follicle and thickening the plug.
What ingredients are best for bumpy skin?
Chemical exfoliation works far better than scrubbing. Salicylic acid clears inside the follicle, lactic and glycolic acid loosen surface build-up, and urea both exfoliates and hydrates.
Retinoids normalise how skin sheds over time, while ceramides, niacinamide and hyaluronic acid keep the barrier strong so the plugs stop reforming. Consistency matters more than strength here. Take our Skin Quiz to work out which exfoliant your skin can tolerate.
