Ionic-Fizz Calcium Plus is a delicious beverage (actually, a powder you mix gently into water) that provides the world's best absorbed calcium and magnesium in the ratio that best supports bones. Because its minerals enter the body in ionic form, its minerals are absorbed better than any others you'll find. It also provides every co-nutrient required for strong bones. It is, in short, the finest bone support supplement ever made. It can be used with any of our Vitamin D series products, and with any multiple that does not supply more than 5000 IUs of Vitamin D per day.