* Deodorants work by killing bacteria on the skin that produce sweat and odor.

* They usually contain an antibacterial agent, such as triclosan or alcohol.

* Some deodorants also contain a fragrance to help mask the smell of sweat.

Antiperspirants

* Antiperspirants work by blocking sweat glands from producing sweat.

* They usually contain an aluminum compound, such as aluminum chloride or aluminum sulfate.

* Aluminum compounds can cause skin irritation in some people.

* Antiperspirants can also be harmful if they are ingested, so it is important to keep them out of reach of children.