Compare Supplements

Topical OTC use. Benzoyl peroxide is used at 2.5-10% in gels, creams, and washes, applied to acne-prone areas once or twice daily; lower strengths (2.5-5%) are usually as effective as 10% with less irritation. There is no oral or systemic dose — it is not ingested. It is often combined with a retinoid (e.g. adapalene) for greater effect. This library does not provide an ingestion protocol.

Any time

Leave-on gel/cream (2.5-5%) or a fixed combination with a retinoid

Topical cosmetic only. Centella/cica is used in serums, creams, and balms (often standardized to madecassoside/asiaticoside) applied to clean skin once or twice daily, popular for soothing and post-procedure care. There is no oral, injectable, or systemic dose in this cosmetic context — oral gotu kola is separate. This library does not provide an ingestion protocol.

Any time

Leave-on serum, cream, or balm standardized to centella triterpenes

• For topical (skin) use only — not for ingestion, not for injection
• Known allergy/sensitivity to benzoyl peroxide (true allergic contact dermatitis is uncommon but possible)
• Application to broken, severely inflamed, or sunburned skin until healed

• Topical retinoids degraded by oxidation (some tretinoin formulations)
• Other irritating actives (acids, other retinoids)

• For topical (skin) use only — not for ingestion in this context
• Known allergy/sensitivity to centella or its triterpenes
• Application to broken or irritated skin if it causes stinging, until healed

• Other leave-on actives