Why is aluminium so important in reducing sweat?
Antiperspirants contain ingredients called aluminium salts (sometimes referred to aluminium/zirconium salts) that dissolve in sweat and leave a thin coating of gel over the sweat glands. This coating reduces the amount of sweat on the skin for a number of hours after the antiperspirant is applied. Alum, a salt of aluminium, is the crystal widely used in natural deodorants/antiperspirants and works along similar lines.
