Bone Builder with Magnesium Glycinate features certified microcrystalline hydroxyapatite concentrate (MCHC), a whole bone concentrate composed of calcium, numerous other minerals, and organic factors that naturally comprise bone. Bone builder with boron is an excellent supplement for those concerned about bone loss or anyone desiring to build and maintain strong healthy bones. Bone Builder with Magnesium Glycinate is: Extremely low in lead and other heavy metals. Cold processed to help preserve the organic components Made only of premium quality, edible grade MCHC, derived from New Zealand cattle that are free-range fed on land where no pesticides are used. Directions: Take up to 6 tablets daily with or without food.