Store brands of baking soda contain benezene, which is also high in bicarbonate drinks aka soda pop. Hulda Clark 's store has purified baking soda without benezene and without other chemicals. I can't find purified baking soda elsewhere thus far. I'm mixing it with 1 part potassium bicarbonate and 2 parts baking soda. Check out the year long double blind research done on kidney patients who stayed off of dialysis thanks to baking soda. Only use at night when you don't need the acidic stomach acid for digestion and don't use more than 1 to 1 1/2 tsp. It does make you feel better when you wake up. Read the medical paper on why this assist the kidneys to detox, also great for chemo therapy (stupidly ignorant) patients. Dr. Donald W. Miller and others have written great info on this and Iodine Therapy. Scientifically authenticated, validated, PROVEN (the AMA hates that word) to assist and prevent Breast Cancer (Iodine / B Soda), etc.