BioGenesis natural ocean plant calcium is a nutrient dense multi-mineral complex whole food, derived from Lithothamnion calcareum. It is a highly bioadaptive source of calcium, magnesium, manganese, sodium, iodine selenium, strontium, boron and over 70 other marine trace minerals. Due to its organic plant source, its high bioavailability lies in its unique composition and porous, honeycomb structure allowing for greater bodily absorption and uptake, compared to other forms of soil mined calcium. It is sustainably harvested in the pristine waters off the northern coast of Iceland.BioGenesis Organic Ocean Plant Calcium contains no filling or bulking agents, Kosher, Halal, and VEGAN.