Antiperspirants or Deodorants work by clogging, closing, or blocking the pores with powerful astringents - such as aluminum salts so that they cannot release perspiration. Many natural health care proponents argue against using aluminum because it accumulates in the brain. Deodorants work by neutralizing the smell of the perspiration mixed with "body dust" (skin, hair and other bacterial goodies we carry around on ourselves all day), and by antiseptic action against that bacteria. Deodorants are more healthful because they don’t interfere with perspiration, a natural cooling process.