Benzoyl Peroxide

BPO
Average
Warning
Pores
0/5
Irritancy
4/5
FA Safe
✅ Yes
Pregnancy
⚠️ Caution
Vegan
✅ Yes

Science & Benefits

Benzoyl Peroxide ($C_{14}H_{10}O_4$) is a lipophilic oxidizing agent. It penetrates the pore and releases oxygen, which is lethal to the anaerobic C. acnes bacteria. Because it kills via oxygenation, bacteria cannot develop resistance. Its 'Average' rating reflects its high potential for barrier disruption; however, in the logic of acne eradication, it remains a gold-standard active when used in concentrations of 2.5% to 5%.

Safety Alerts

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Pregnancy: Some studies suggest absorption or systemic effects. We recommend switching to a pregnancy-safe alternative.