Rosmarinic Acid

Rosmarinic acid — from rosemary, lemon balm, and perilla — is a polyphenol with documented anti-inflammatory, antioxidant, and antimicrobial activity. It inhibits inflammatory enzymes (5-lipoxygenase, complement) and scavenges free radicals, giving it utility in calming redness and protecting against pollution- and UV-induced stress. At 0.05–0.5% it soothes reactive and blemish-prone skin and stabilises oxidation-prone formulas. Japanese research highlighted it for pigment moderation as well. Gentle and broadly compatible, it functions as both active and protector — a sensible component of modern "defence" serums for urban skin.