We use superior science to make smarter formulas like Jarrow Formulas® BoneUp®. It is a comprehensive micronutrient formula that provides StimuCal MicroCrystalline HydroxyApatite (MCHA) and micronutrients to support bone health and density as well as skeletal nutrition. StimuCal MCHA 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, which has been shown to support bone health. Vitamins D3 and K2 (as MK-7) are included to support calcium deposition into bones.