Coptis Japonica Root Extract

Evidence by route

About this ingredient

Coptis Japonica Root Extract is derived from the root of Japanese/Chinese herb Coptis japonica. Contains the alkaloid berberine and its analogues (coptisine, palmatine). Mechanism. In lab models berberine suppresses growth of Cutibacterium acnes, Staphylococcus aureus, Malassezia furfur, and inhibits tyrosinase (hence a theoretical brightening effect). Marketed as an anti-inflammatory and anti-acne ingredient. Where applied. Asian-origin serums and creams for acne-prone skin, post-acne pigmentation products, toners for oily skin. In Spain – niche K-beauty and J-beauty lines. Evidence base. Human skin data are limited. A topical berberine acne RCT (Fouladi 2012) showed moderate reduction in inflammatory lesions over 4 weeks, comparable to 1% erythromycin. No direct human RCTs on the full Coptis japonica extract. Safety. Low risk of irritation and allergy with short-term use. CIR has not issued a direct evaluation. Berberine can stain skin yellow at high concentrations. Pregnancy and lactation – with caution. Systemically berberine is contraindicated in pregnancy because of the risk of kernicterus in newborns when ingested; topical use at cosmetic concentrations is poorly studied, so caution is justified. Best suited to: oily and combination acne-prone skin, post-acne pigmentation. Not first-line for acne – proven molecules (retinoids, azelaic acid, benzoyl peroxide) work more reliably.

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