BoneUp® is a comprehensive formula that provides StimuCal™ MicroCrystalline HydroxyApatite and micronutrients to support bone health.* StimuCal™ is a natural source of calcium shown to support bone mineral density better than calcium carbonate.* StimuCal™ also provides bone proteins, including type I collagen. Vitamins D3 and K2 (as natural MK-7) work together to support calcium deposition into bones.*