Aluminum salts are chemical compounds commonly used in personal care products, particularly antiperspirants, to reduce sweat and control odor. Aluminum salts are found in roll-on, stick and spray deodorants and are applied to the underarms to reduce perspiration. There have been concerns over the safety of aluminum salts in antiperspirants including potential links to breast cancer, neurological disorders and kidney function, but scientific research is ongoing. Regulatory agencies, such as the FDA and the European Commission, have reviewed the safety of aluminum salts and have considered them safe for use at limited concentrations. Still, some regions have restricted the use of aluminum salts because of these concerns.