Conventional calcium supplements isolate one mineral from a system that was never designed to work alone. MK's Bone & Marrow delivers 3,000mg of grass-fed whole bone and marrow per serving, preserving the complete bone matrix alongside the marrow cavity that most supplements discard entirely. Whole bone brings calcium and phosphorus in their natural ratios alongside collagen and bone-specific proteins. Bone marrow adds stem cell precursors, hematopoietic factors, and naturally occurring CLA. Freeze-dried for optimal nutrient retention without heat damage. No magnesium stearate, no artificial additives.