Baking soda and cornstarch
Using baking soda as a deodorant is a simple way to combat body odor without subjecting your pits to a variety of chemicals. Mix an eighth of a teaspoon of baking soda with a little bit of water — don't dissolve it — and rub it under your arms. You can also create a baking soda and cornstarch mix to fight odor and help prevent wetness. Simply mix one part baking soda with six parts cornstarch and dust a little on your underarms.