 The Natural Skincare Authority has also stated that “The Aussie Mega Shampoo does not meet any natural ingredient parameter.” Some Aussie products contain sodium lauryl sulphate, an alkaline ingredient that helps penetrate dirt and oil on hair.The manufacturing process of this chemical may leave traces of dioxane, a probable human carcinogen (according to Natural Health Information).Many Aussie products also contain a variety of parabens such as propylparaben and methylparaben.