Benzoyl Peroxide
An oxidizing antibacterial active that kills C. acnes bacteria by releasing oxygen radicals, widely used in OTC and prescription acne treatments.
Also known as: bpo
Benefits
- ✓Kills acne-causing C. acnes bacteria via oxidation
- ✓Reduces inflammatory acne lesions
- ✓Mild comedolytic/exfoliating effect
Watch for
- ⚠Can cause dryness, peeling, and irritation, especially at higher concentrations
- ⚠Bleaches fabric, towels, and hair
- ⚠Photosensitizing; use sunscreen
In depth
What it does
An oxidizing antibacterial active that kills C. acnes bacteria by releasing oxygen radicals, widely used in OTC and prescription acne treatments. As an active ingredient, it is particularly valued for kills acne-causing c. acnes bacteria via oxidation, reduces inflammatory acne lesions, and mild comedolytic/exfoliating effect.
Skin type guide
Sensitive skin types should introduce this ingredient slowly and watch for any signs of irritation. Most other skin types tolerate it well.
How to use it
Apply after cleansing and any toning steps, before moisturiser. Start with a few times per week to assess tolerability before building to daily use.
Common questions
What should I avoid combining with Benzoyl Peroxide?
Take care when layering Benzoyl Peroxide with Retinol and Retinal. These combinations can reduce each other's effectiveness, increase the risk of irritation, or destabilise the formula. When in doubt, use them in separate routines (e.g. one in AM, one in PM).