The active ingredient in deodorant and antiperspirants is an aluminum-based substance that varies based on whether the product is in roll-on, gel, solid, aerosol, or stick form. While roll-on deodorant usually contains aluminum chlorohydrate, stick products sometimes use aluminum salts.
Antiperspirants and deodorants are used for controlling body odor and perspiration. For people who suffer excessive perspiration, there are stronger over-the-counter products with a higher aluminum content. Although aluminum-based compounds are the active ingredients in these products, they also contain many other ingredients, such as parabens, fragrance, propellants, alcohol and emollients. While some people believe that the aluminum in deodorants can increase the risk factor for certain diseases like breast cancer, there is no scientific evidence that aluminum poses any risks.