You probably think of aluminium when you reach for the foil to cover your leftovers or take your soda or seltzer cans to recycle. The aluminium in deodorants is an aluminium salt, often aluminium chlorohydrate. This ingredient has been used for over half a century to control sweat and odour in antiperspirants. Other aluminium salts are found in vaccines, water treatment and antacids, among countless other uses. Aluminium chlorohydrate seeps into your skin and plugs your pores temporarily, preventing sweat from reaching the surface. Some people favour a product that stays on the skin's surface and does not interfere with perspiration. Switching to a deodorant without aluminium may be appropriate if you seek a different strategy to cope with sweat and odour. How Does Deodorant Without Aluminium Work? Deodorants do not contain aluminium salts to control sweat. They control odour by going after its culprit: the bacteria that live in your armpits. Sweat is virtually odourless, but it he