This is a quote from a book written in the 1880's.

In 2016 the size of the antiperspirant market is expected to be over 18 billion US dollars. Amazingly, while deodorants are classed as cosmetics, antiperspirants are classed as drugs. The American FDA classes them as drugs because they modify or change a natural bodily function, that is, the sweating function. Antiperspirants work by blocking up the pores of your skin so that the sweat cannot get out.

Early antiperspirants were made from aluminium salts, then there was a trend to make them from zirconium salts using zirconium basic carbonate as the starting material. There are now a wide range of antiperspirants including mixed aluminium-zirconium formulations as well as non-metal formulations.