 And calcium supplements, you know, they buy at the health food store or drug store. But these calciums don't absorb in the body. That's interesting. For a couple reasons. One, when you take, let's say, an antacid that has the calcium in it, like a Tums. First of all, calcium does not absorb in the body unless it's in an acidic environment. But see, what happens when you take a Tum? It's an antacid.