This formulation contains Aquamin?, an organic source of Calcium, Magnesium and 72 other trace minerals from Lithothamnium Calcareum, a rare seaweed harvested from the clear pristine waters off the southwest coast of Ireland. A unique feature of this formulation is its high bioavailability because of its unique porous honeycombed vegetative cell structure. Kordell's Organic Vege-Cal is a 100-Percent natural, plant-based Calcium-rich product which also makes it suitable for vegetarians. It also contains a comprehensive profile of bioavailable minerals which are essential for optimal bone formation.