Deodorants are substances applied to the body mainly to reduce body odor caused by the bacterial breakdown of perspiration. A subgroup of deodorants, antiperspirants, prevent odor and reduce sweat produced by parts of the body. Antiperspirants are typically applied to the underarms, while deodorants may also be used on feet and other areas in the form of body sprays. Overview Human perspiration is largely odorless until it's fermented by bacteria. Bacteria thrive in hot, humid environments. The… (More on Deodorant)