White (yellow) grapefruit essential oil (Citrus paradisi) is cold-pressed from the peel of non-pigmented cultivars and shares the same dominant monoterpene skeleton as other grapefruit varieties, with d-limonene constituting >97% of the terpene fraction, followed by β-myrcene and y-terpinene.^[1] GC-MS analysis confirms that 24 volatile components account for 99.7% of the oil, with the oxygenated fraction—including nootkatone, octanal, and decanal—comprising the characteristic odour-active minority.^[1] The oil exhibits antimicrobial activity against Bacillus subtilis, Escherichia coli, and Staphylococcus aureus, and demonstrates antiproliferative effects against human cancer cell lines in vitro.^[1]