And if the deodorant companies know that aluminum causes cancer, why do they keep putting it in their products?Aluminium-based complexes react with the electrolytes in the sweat to form a gel plug in the duct of the sweat gland. The plugs prevent the gland from excreting liquid and are removed over time by the natural sloughing of the skin. The metal salts work in another way to prevent sweat from reaching the surface of the skin: the aluminum salts interact with the keratin fibrils in the sweat ducts and form a physical plug that prevents sweat from reaching the skin’s surface. Aluminum salts also have a slight astringent effect on the pores; causing them to contract, further preventing sweat from reaching the surface of the skin.The blockage of a large number of sweat glands reduces the amount of sweat produced in the underarms,Antiperspirant. okorder.com/to okorder.com/It helps keep you from smelling.Other related question