This powder is known as a deodorant alternative. To use Tawas powder for deodorant, it is best to use it right after a shower. While your skin is still a bit damp, put the Tawas powder under your armpits just like a deodorant. You can mix a bit of water into the Tawas powder you put into your hands if you do not like tiny grains of powder under your arms. Tawas powder also has a known whitening effect on the skin so if you are trying to lighten your underarm areas; this is an excellent item to use.