What is antiperspirant and how does it work?

Antiperspirants act by plugging the sweat ducts, reducing sweat. Because perspiration stimulates odor-causing bacteria, antiperspirants also help reduce body odor.

How do Secret antiperspirants help prevent underarm odor and sweat?

Because perspiration in the underarms doesn't readily evaporate, a feeling of sweat results, and bacteria thrive in that sweat, creating underarm odor. Secret works by slowing the flow of perspiration to the surface of the skin. It does so by being pH- (measure of alkalinity) balanced. When the active ingredient in Secret comes in contact with your perspiration, it dissolves into the sweat ducts. As you continue to perspire, the perspiration makes the pH of the solution rise. When the solution reaches a high enough pH, the active ingredient forms superficial plugs in those sweat ducts, reducing the flow of perspiration to keep you feeling dry. Secret protects you from underarm sweat (antiperspirant) and also helps prevent underarm odor (deodorant).

How do deodorants work?

Unlike antiperspirants, deodorants don’t reduce sweat; they help reduce the bacteria that thrive in perspiration and cause the odor. By doing this, deodorants cover up underarm odor. In addition, most deodorants are scented to fight odor.