Arganour Cosmetics. HAIR SERUM argan oil. Hair serum with 100% natural argan oil and organic ingredients. It is composed of 7 natural active ingredients: silk protein, argan oil, castor, coconut, sweet almonds, avocado and orange essential oil. Leaves hair soft, shiny & nourished. It is an effective treatment for split ends. Apply a small amount on the palm of the hand, rub and apply it to all the hair, it can be applied to dry hair as it does not leave it greasy. It does not need rinsing.