I have gotten a lot of feed back from many calcium users and for most of us this seems to be the combination of ingredients that helps the most.Vitamin D 200 IUCalcium 600 MG (Calcium Carbonate 500 MG also works)Magnesium 40 MG (A very small amount of this because more can cause diarrhea)Zinc 7.5 MGCopper 1 MGManganese 1.8 MGBoron 250 MCGTake Care,Linda