Natural Factors Calcium &Magnesium 2:1 Plus Vitamin D3 contains essential nutrients for the maintenance of good health and for the normal development and maintenance of healthy bones and teeth. This formulation contains the perfect mineral ratio for stronger bone calcification plus vitamin D for superior mineral absorption and utilization.

Each Capsule Contains: Elemental calcium (carbonate)|250mg Elemental magnesium (oxide)|125mg Vitamin D3 (cholecalciferol)|2.5mcg (100IU) Non-Medicinal Ingredients: Gelatin capsule (gelatin, purified water, titanium dioxide), microcrystalline cellulose, vegetable grade magnesium stearate (lubricant).

1-4 capsules daily, a few hours before or after taking other medications, or as directed by a health care practitioner.

Argiratos, V., and S. Samman. "The effect of calcium carbonate and calcium citrate on the absorption of zinc in healthy female subjects." European journal of clinical nutrition 48.3 (1994): 198. http://www.ncbi.nlm.nih.gov/pubmed/8194505 Anderson, J. J. B. "Calcium, phosphorus and human bone development." The Journal of nutrition 126 (1996). http://agris.fao.org/agris-search/search.do?f=1998/US/US98250.xml;US1997059263, Argiratos, V., and S. Samman. "The effect of calcium carbonate and calcium citrate on the absorption of zinc in healthy female subjects." European journal of clinical nutrition 48.3 (1994): 198. http://www.ncbi.nlm.nih.gov/pubmed/8194505 Anderson, J. J. B. "Calcium, phosphorus and human bone development." The Journal of nutrition 126 (1996). http://agris.fao.org/agris-search/search.do?f=1998/US/US98250.xml;US1997059263 Beyer, F. R., et al. "Combined calcium, magnesium and potassium supplementation for the management of primary hypertension in adults."Cochrane Database Syst Rev 3 (2006). http://summaries.cochrane.org/CD004805/combined-calcium-magnesium-and-potassium-supplementation-for-the-management-of-primary-hypertension-in-adults