The correct answer to this question is baking soda. Also known as sodium bicarbonate, baking soda has many uses and benefits. Its most popular use is in baking, in which is helps cause the dough to rise. Baking soda can also be used to treat heartburn. It does so by neutralizing the stomach acid.
It has many hygeine benefits as well . It can be used as mouthwash, teeth whitening, deodorant, help heal sunburns and help with healing canker sores. Baking soda is also used as a freshner for refridgerators. It helps remove any bad odors by releasing fragrance molecules.