Marine Based Cal-Mag Veggie Caps offer 250 mg of Calcium along with 125 milligrams of Magnesium per serving. These bioavailable minerals are sourced from Aquamin Red Algae and Seawater, harvested in the cool, clean, pristine waters off the coast of Iceland, in an area untouched by industry. The warm waters of the Gulfstream meet the cold clean waters of the Arctic creating perfect conditions for Red Algae. This Marine Calcium, Magnesium, and Multi-Mineral Seawater complex supplies bioactive Magnesium, Calcium, and 72 additional trace minerals.