Carrier oils contain vitamins, minerals and essential fatty acids (EFA), and many of them soften and improve the condition of the skin. Some of them are also highly effective in treating irritated, sensitive conditions such as eczema and psoriasis as well as helping to reduce wrinkles and scar tissue. What EFA’s Oleic acid is a monounsaturated fatty acid or omega-9 Linoleic acid (LA) is a polyunsaturated omega-6 fatty acid. Important for cell membranes. Linolenic acid. There are two forms: Alpha linolenic acid (ALA) is an omega-3 polyunsaturated fatty acid Gamma linolenic acid (GLA) is an omega-6 unsaturated fatty acid. These are closely related to omega-3 fatty acids found in fish oil, which are called eicosapentaenoic acid.