Garnier Ultra Doux Black Charcoal & Nigella Seed Oil Leave-in cream is a real recipe to boost shine and ease the styling. Combining Nigella Seed Oil, also known as Black Seed, a precious natural ingredient known to soothe and restore hair's shine, and Charcoal, known for its purifying properties, in a silicone free natural creamy texture without weighing down your hair. Result: Hair's shine is naturally boosted and easier to style. Day after day, hair is silkier and softer to the touch.