Value Size Up-Formulated Superior Skeletal Support Microcrystalline Hydroxyapatite Potassium Citrate & Natural MK-7 Promotes Bone Density Supports Cardiovascular Health Dietary Supplement Gluten Free Non GMO Bone-Up provides StimuCal ossein MicroCrystalline HydroxyApatite (MCHA) (from free-range New Zealand calves), which includes the superior combination of the inorganic calcium lattice of MCHA within an organic protein milieu. StimuCal is rich in native type I collagen the predominant protein found in bone-and has been clinically demonstrated not to disaproportionately spike calcium blood levels as do other forms of calcium, such as the carbonate and citrate salt forms. StimuCal is combined with D3 and vitamin K2 (as MK-7 from natural fermentation [a more bioavailable form of vitamin K]) to support the proper deposition of calcium into the bone matrix, thereby maintaining skeletal integrity, as well as supporting cardiovascular and arterial health. Potassium citrate is a systhemic alkalizer added for optimal oasteo support. Health Claim: Adequate calcium and vitamin D as part of a healthful diet, along with physical activity, may reduce the risk of osteoporosis later in life.