But, from what I can discern from your lengthy dissertation, my statement still stands: Calcium is the major ingredient in most OTC antacids.
Try to find some plain calcium. No, I wasn't trying to show off. I was hoping to teach some chemistry. The gov't does all sorts of things, such as regulating the environment, that it would help if the people understood some science.
If you took calcium chloride, it wouldn't do anything for heartburn. I wasted my time, and I can't type. I regret sending you the comment. Hopefully, someone else might profit, but it's unlikely many will read it now. The thread is rather stale. Adios