Randie,As far as I know, calcium did not do much for pain or gas. In the beginning it actually gave me more gas, but that went away. It just improved my D. I had to really search for a brand of calcium carbonate (600mg/pill) WITHOUT magnesium stereate, as that made my D worse. I had to switch from one storebrand copy of Caltrate to another for that reason.Hope this helps some.Edith