Before we look at how deodorant works, we need to examine what causes sweat and the science of sweating.
When the environment, such as heat or stress triggers our sweat glands, they secrete water and salt.
Most people think that sweat itself is the source of unpleasant odour. In fact, the smell comes from the bacteria on the skin that ingests the sweat at the apocrine glands – the glands in your armpits.
To improve your comfort and well-being deodorant sprays block the bacteria rather than the sweat glands themselves.