PETROSELINUM CRISPUM LEAF EXTRACT.

This extract deploys its benefits through several pathways. Its high content of polyphenols, flavonoids (like apigenin and kaempferol derivatives), and carotenoids confers potent antioxidant activity, effectively neutralizing free radicals, reducing oxidative stress, and upregulating endogenous antioxidant enzymes such as superoxide dismutase (SOD) and catalase (CAT). Anti-inflammatory actions are achieved by suppressing inflammatory cytokines (including IL-33, IL-6, and IL-8) via inhibition of the JAK1/STAT1 and NF-κB signaling pathways. Furthermore, it supports skin barrier integrity by enhancing the expression of crucial proteins like filaggrin and claudin-1, with apigenin specifically noted for improving both physical and chemical skin barriers. The extract also contributes to skin tone uniformity by reducing pigmentation and assists in balancing sebum production, alongside demonstrating antimicrobial effects against certain pathogens.