OsteoBase includes 300 mg of elemental calcium and 300mg of elemental magnesium per serving, with multiple forms of calcium to ensure maximum absorption. OsteoBase also includes the highest-quality forms of vitamin K2 (MK-7), and vitamin D (D3) to ensure maximum bioavailability and a synergistic benefit for the absorption and assimilation of calcium within the body. OsteoBase covers the most common nutrient deficiencies in one convenient, foundational bone health formula.