Daily Defense 16 oz (large) with Macadamia Nut Oil. Macadamia oil contains essential fatty acids, vitamins and natural antioxidants that are believed to improve frizzy hair by smoothing and coating the hair shaft. Hair will be revitalized and nourished. Macadamia oil can be used to fight hair breakage. The oil easily penetrates the scalp and hair follicles and improves hair-strength and elasticity. As you age, the amount of palmitoleic acid in your body decreases. This Omega-7 fatty acid contributes to softening and protecting the hair protein structures and lubricates the hair. By using Macadamia oil, pamlitoleic acid is replenished and the hair becomes hydrated, shiny and healthy.