Plai oil, steam-distilled from Zingiber zerumbet rhizomes, is defined by zerumbone — a monocyclic sesquiterpene ketone absent from common culinary ginger (Z. officinale) — whose a,β-unsaturated carbonyl group underpins potent anti-inflammatory activity via inhibition of NF-κB signaling and dose-dependent suppression of TNF-a, IL-1β, PGE2, and COX-2 in both acute and chronic inflammation models.^[1] Comprehensive pharmacological reviews confirm analgesic, anti-inflammatory, antioxidant, and immunomodulatory properties that are mechanistically distinct from the gingerol-driven activity of Z. officinale.^[2] Long used in Thai traditional massage and sports injury treatment, plai has gained Western recognition among sports therapists for its marked muscle and joint applications.