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 are fine lines?
Fine lines are the earliest visible sign of skin ageing: shallow creases that appear where skin is thinnest and most expressive – around the eyes, across the forehead, and at the corners of the mouth.
They differ from established wrinkles in that they are often still dynamic, showing mainly when you smile or squint, and are frequently worsened by dehydration. That makes them the most responsive stage to treat.
What causes fine lines?
Intrinsic ageing does part of the work: collagen production falls by roughly one per cent a year from the mid-twenties, elastin degrades, and the dermal matrix thins so skin no longer springs back.
The larger share is external. Ultraviolet exposure accounts for the majority of visible facial ageing, and pollution, smoking, poor sleep, sugar-driven glycation and repeated facial movement all accelerate it. Dehydration makes existing lines look deeper than they are.
What ingredients are best for fine lines?
Retinol and prescription retinoids have the strongest evidence for stimulating collagen and smoothing texture. Vitamin C protects against free-radical damage while supporting collagen synthesis, and peptides signal the skin to rebuild.
Pair those with hyaluronic acid and ceramides for immediate plumping and barrier support, niacinamide for tone, gentle AHAs for surface renewal, and coenzyme Q10 as an antioxidant. Daily broad-spectrum SPF protects everything else you are doing. Take our Skin Quiz.
