Lemon juice can be harmful to the enamal of the teeth. Don't use it will baking soda that is FREE of BENZENE (not store brands as Hulda Clark mentions, but I haven't found a clean source yet). Take only 1 tsp at night only is what authorities advocate (poss. 1 1/2 level tsp depending on results). You do it at night because you don't need the acidic stomach pH for digestion. Heartburn comes from too little stomach acid, contrary what ignorant MDs think. Read the studies (a year long double blind study in England) on baking soda and improved kidney health preventing dialysis, etc.