What it is
Benzoyl peroxide is a well-known skincare ingredient used to treat acne. It works by killing acne-causing bacteria, reducing inflammation and helping to clear blocked pores. You will often find it in spot treatments, face washes and leave-on gels.
How it works in skincare
Mild to moderate acne – Helps clear existing spots and prevent new breakouts.
Inflamed blemishes – Reduces redness and swelling.
Body acne – Often used in body washes for the chest, back and shoulders.
When to Be Cautious with Benzoyl Peroxide
Benzoyl peroxide can be drying and irritating, especially for sensitive skin. It may cause redness, peeling and flaking, particularly within the first several weeks of use. Its use can exacerbate dryness and eczema, and is not suitable for rosacea-prone skin. It also bleaches fabrics such as towels and pillowcases.
Safety Concerns
There has been growing concern over the presence of benzene, a known carcinogen, in some benzoyl peroxide products sold in the USA. Independent testing found that under certain conditions, particularly heat, formulations containing it might break down and release benzene. This has raised safety questions and led to calls for more regulation and testing. Some dermatologists suggest being cautious, especially with over-the-counter products stored in warm environments.
If you are considering using benzoyl peroxide, it is worth choosing reputable brands and storing products properly. For milder or sensitive skin concerns, ingredients such as Azelaic Acid might be better tolerated.
