Grapefruit Oil Dårligst Irritant Anti-aging Grapefruit Oil at a glance Oil extracted from grapefruit peel Contains vitamin C + other antioxidant compounds Also a source of volatile components Causes skin irritation because of phototoxicity Steam-distilled preferred to cold-pressed Grapefruit Oil description Citrus oil whose volatile components (chiefly substances known as furocoumarins) are sensitising to skin. Topical application of grapefruit oil may cause sensitising reactions from its chief fragrance chemical, limonene. Related ingredients: Limonene Grapefruit Seed Extract Grapefruit Peel Extract