Bluebonnets Liquid Bone Support with Calcium Magnesium Citrate Plus Vitamins D3 & K2 is formulated with the more bio available chelated forms of calcium (calcium citrate) and magnesium (magnesium citrate and aspartate). Calcium and magnesium are the most abundant minerals in the body. They are not just necessary for healthy bones and teeth they are also essential for healthy blood circulation nerve impulse transmission muscle contractions and cell metabolism. This bone-building formula also incorporates vitamin D3 (cholecalciferol) from lanolin and vitamin K2 from natto to further increase bone density and reduce bone loss. Available in a delicious blueberry flavor