Oil argan is used both for food and cosmetics. It is an oil rich in oleic acid (monounsaturated fatty acid) and in linoleic acid (polyunsaturated fatty acid of the omega 6 series). The linoleic acid is an essential fatty acid, which means that the organism is not capable of making it itself : it must be brought by food. Argan oil is also rich in vitamine E, with anti-oxydant proprieties. In cosmetics, it is helpful for the care of hair, nail and skin : its richness in omega 6 and in vitamine E would prevent from cutaneous dehydration and ageing.