I buy the generic calcium w/Vitamind D. On the back of the bottle it lists "Supplement Facts" and shows Calcium and Vitamind D. Then under "Ingredients", it lists several things, including calcium carbonate and magnesium stearate. Is this the magnesium that is said to almost counteract the calcium effect? I have used this type of calcium for a year now, and it has greatly improved, if not cured, my IBS-D. I have also seen bottles that list Magnesium under the supplements section. So I'm confused. Thanks!!