Antiperspirants are designed to reduce sweating while deodorants are designed to cover up the smell. Antiperspirants usually include aluminum-based compounds that temporarily block sweat pores. Blocking sweat pores reduces the amount of perspiration that reaches your skin. There’s a concern that if the skin absorbs these aluminum compounds, they can affect the estrogen receptors of breast cells.
Deodorants are formulated to eliminate armpit odor but not perspiration. When applied, they turn your skin acidic, which makes it less attractive to bacteria. The addition of essential oils helps to create a fresh scent which helps you smell fresh throughout the day.