Dietary Supplement. Extra "D-3," mk-7 & Every Co-Factor Needed for Strong Bones* Superior Absorption. Super D-K Calcium Plus™ Calcium Plus™ Calcium is best absorbed in pure, ionic form. Its absorption is enhanced by Vitamin D3. Studies suggest that we need much more vitamin D than current supplements provide. With a perfect ratio of calcium to magnesium, 1000 IU of vitamin D3, 45 mcg of Vitamin K2 and other co-factors, Ionic-Fizz™ Super D-K Calcium Plus™ is a superb, delicious solution for supporting strong bones.* Ionic-Fizz™ Super D-K Calcium Plus™ contains no artificial colorings or flavorings, GMO s, refined sugars, soy, yeast, dairy, gluten, wheat, MSG, or other common alle.