Aluminium

Aluminium-based ingredients are the key active ingredients in most antiperspirants. They work by dissolving in sweat and forming a temporary, invisible gel layer over the sweat glands, which reduces how much sweat reaches the surface of the skin. Even “natural” deodorants often contain alum, a naturally occurring aluminium salt, that functions in a similar way.

Aluminium is the third most abundant element in the Earth’s crust. We encounter it daily through food, water, pharmaceuticals, and a wide range of consumer products.

For more information, see our FAQ on aluminium.