Easiest way I know how to create Stomach Acid's/Hydrochloric Acid is Cayenne, powder or tincture. You don't even have to swallow it just put it in your mouth and your body will generate more hydrochloric acid. I've never heard that about beets though. I have always had some red poo after the beet juices and occasionally red urine. Just figured that was part of the deal. LOL.