Sodium bicarbonate, also known as baking soda, is promoted by some alternative practitioners as a cancer treatment. One of the theories is that cancer is caused by a form of yeast infection, from a type of yeast known as Candida albicans, and that sodium bicarbonate can kill the yeast. There is no credible evidence to support this claim. Another theory is that cancer cells thrive in a low oxygen environment that likes the blood to be acidic. By consuming baking soda you restore the alkalinity, so the cancer can’t survive. There is no scientific evidence for this theory either. The idea that sodium bicarbonate works as a treatment for any form of cancer has no substance. There is substantive evidence, however, that while sodium bicarbonate is safe when used in proper doses and as directed, high doses can cause serious problems or even death.