it gives added calcium too, I think that the most recommended one is calcium citrate, @azygous can give you information on that better than I can as haven't really used it.They have oyster shells available. What does the Tums do? I wish I knew which one did it for sure. Sneaky little things
We all learn and help each other out, so we don't stress as bad knowing someone usually has learned answers to help when someone else doesn't know or who to tag if we don't know. That is what is so great about this community