Then, of course, there's all the personal hygiene ways to use those two items. Baking soda can be used to brush your teeth, as a face scrub or even a shampoo. I don't recommend using it daily as a shampoo, but monthly, as a deep cleanser, it's great. Just make sure to rinse with diluted vinegar (apple cider works better than white here) to bring your skin and scalp back into the proper pH balance.