Antiperspirants act on the eccrine and apocrine sweat glands, reducing sweat secretion. Because there’s less sweat you’ll notice less dampness and less odor. Antiperspirants contain active substances such as Aluminium Chlorohydrate (ACH) and Aluminium Chloride (AC). Eucerin 48h Anti-Transpirant Roll-On contains ACH and Eucerin 72h Anti-Transpirant Intensive Pump Spray contains both ACH and AC. AC molecules are smaller and have a lower pH value than ACH molecules so they can get even deeper into the sweat ducts and keep them closed for longer. Even small quantities of antiperspirant can effectively reduce sweating. You can read more about how deodorants and antiperspirants work in sweating – what it is and how it affects people.