GASTRODIA ELATA FLOWER EXTRACT.

This extract operates through a multifaceted approach to improve skin physiology. Its antioxidant capacity involves direct neutralization of reactive oxygen species and activation of the Nrf2/ARE signaling pathway, upregulating endogenous antioxidant enzymes such as superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px). It significantly reduces UV-induced matrix metalloproteinases (MMPs), thereby protecting vital collagen and elastin structures to mitigate sagging and wrinkle formation. For depigmentation, it inhibits melanin synthesis by suppressing tyrosinase activity and downregulating the mRNA and protein expression of key melanogenesis mediators including MITF, tyrosinase, Trp1, and Trp2. Anti-inflammatory actions are mediated by inhibiting the excessive expression of cyclooxygenase-2 (COX-2) and prostaglandin E2 (PGE2), which subsequently reduces the release of pro-inflammatory cytokines like interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-alpha). Additionally, its polysaccharides and amino acids form a hydrophilic film, reducing transepidermal water loss (TEWL) and enhancing hydration by binding natural moisturizing factors within the stratum corneum, promoting healthy keratinocyte differentiation and filaggrin expression. Steroidal compounds, such as β-sitosterol, further contribute to stratum corneum hydration and barrier improvement, while organic acids like succinic and citric acid may help balance sebum production and maintain optimal surface pH.