About this item Do More For Your Bones - Our unique formula combines synergistic magnesium and zinc.* Synergistic Nutrients - This formula offers 250mg calcium, 125 mg of magnesium, 6mg of zinc, as well as vitamin C and boron to provide a more powerful network for bone support.* Optimal Absorption And Tolerance - This formula is our best compromise between the highest yielding sources of calcium and magnesium and the best absorbed/easiest tolerated sources of these minerals, the citrate forms.* Purity, Quality, Potency - No fillers, binders, preservatives, artificial colors or flavors. Vegetarian capsules. No gluten, egg, peanuts, tree nuts, or magnesium stearate. Supplements arrive in BPA-Free, recycled amber bottles that protect from light contamination. Physician's Choice - The health care professional¿?s choice for high-quality supplements since 1984. We base our products on the latest wellness research and clinical studies, and use third-party testing for all incoming, in-process, and finished product. Products you can trust, at an exceptional value.