Anti-perspirants are especially effective in minimising excessive sweating in the armpits through their main ingredient (based on aluminium salts) and are also usually the first measure that is recommended by dermatologists, as it is a rather “cosmetic” and non-invasive way to keep sweating at bay.
Anti-perspirants contain aluminium salts like Aluminium Chlorohydrate (ACH) or Aluminium Chloride (AC) as active substances. These act on the eccrine and apocrine sweat glands by partially and reversibly clogging the duct of the sweat gland thus reducing the amount of sweat that is produced. This clogging is harmless. Because there is less sweat, there is less dampness and noticeably less odour. Anti-perspirants are available as sprays or roll-ons, and even small quantities of Anti-perspirant can make a big difference to the output of sweat.