The Bone Team: Ortho•Bone™ contains key nutrients that are fundamental to maintaining bone health and preventing disorders like osteoporosis. MCHC (bone meal) is the most superior source of calcium available, containing proteins that actually stimulate bone growth and being the safest for arterial health. Vitamin D is needed for calcium absorption. Vitamin K2 (MK-4 & MK-7) increases bone density and reduces the risk of bone fracture. Vitamin C supports collagen development, which is the foundation of bone structure.