Benzoyl Peroxide
Also known as: BPO, benzoyl peroxide
Antimicrobial and keratolytic agent that kills acne-causing bacteria and promotes skin cell turnover.
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Get the appWhat it does
Benzoyl peroxide works by releasing oxygen into pores, creating an environment hostile to Cutibacterium acnes (formerly Propionibacterium acnes). It also exfoliates the skin and helps unclog pores. Over time, it reduces bacterial counts and inflammatory acne lesions.
Benefits
- Effectively reduces acne-causing bacteria
- Reduces inflammatory papules and pustules
- Non-antibiotic, so bacteria resistance is rare
- Promotes mild exfoliation and cell turnover
- Available over-the-counter in multiple strengths
Who it suits
- Acne-prone skin
- Oily, congested skin
- Mild to moderate inflammatory acne
- Bacterial acne concerns
How to use
Apply a small amount to clean, dry skin once or twice daily, starting with lower concentrations. Gradually increase frequency and strength as skin tolerates. Always follow with moisturizer.
Pairs well with
Salicylic acid, Niacinamide, Moisturizers, Sunscreen
Be careful pairing with
Vitamin C (unstable combination), Retinoids (increased irritation risk)
Safety & cautions
Benzoyl peroxide can cause dryness, redness, and peeling, especially at higher concentrations (5-10%). It may bleach fabrics and hair. Start at lower concentrations (2.5%) and increase gradually; discontinue if severe irritation occurs.
Educational information, not medical advice. Concentration and formulation change how an ingredient behaves.