The fact is, Baking Soda (aka Sodium Bicarbonate) is one of the staple ingredients in many deodorants. It can combat body odor naturally without subjecting your underarm to a variety of chemicals. However, baking soda as a natural deodorant may not work for everybody, especially if you have extra sensitive skin. Baking soda is known to cause skin irritations and allergies, among other people. This is also why today, many natural deodorants, including most of the ones we included in this list, are baking soda free.