Cosmetic function: Antiacne Agent, Oxidising Agent
EWG hazard reflects the rating of the ingredient, not the real-world risk of a finished product — hazard depends on concentration. How we read these.
2.5–10% (OTC)
Lower strengths (2.5–5%) work about as well as 10% for many people, with less dryness and irritation.
A general research norm — not the amount in any specific product (INCI lists don't disclose amounts).
Data is aggregated from EWG, CIR, CosIng and the SkinCarisma community, and improves over time. Spot something off? See our methodology. This is general information, not medical advice.