Calcium Supplement. Gluten free. Bone health advanced (Includes magnesium, manganese, copper and zinc). 2 in 1 dual action. Bone strength & flexibility includes magnesium & zinc. Dual Benefits: Support bone flexibility. Maintain strong bones. 2 in 1 dual action! 1. Calcium, Vitamin D3 and magnesium for bone health. 2. Zinc and other minerals (refers to copper ang manganese) to support collagen production for bone flexibility. Doctor recommended. www.caltrate.com. Facebook: Join us on Facebook. Questions? Comments? Call 1-800-282-8805. For most recent product information, visit www.caltrate.com. (These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.)