About this item Plant-Based Calcium Supplement: AlgaeCal Basic is derived from a South American ocean algae that is hand-harvested. This algae supplies all 13 essential bone-supporting minerals, including calcium, silicon, selenium, and potassium. All-Natural: Most calcium supplements are made from crushed-up rocks, and donҴ contain all 13 of the clinically supported bone-building minerals. But AlgaeCal is plant-based, and naturally contains ALL of the minerals shown to make bones stronger. Clinically Supported: AlgaeCal Basic is scientifically backed by published clinical studies. These studies show that the nutrient combo in every serving can help keep healthy bones for life. Sustainable Superfood: The algae are hand-harvested from pristine beaches in South America, gently washed in fresh water, and sun-dried. The dried algae are then carefully milled down to powder with zero chemicals or additives - just pure whole-food from a living plant. Manufactured in the USA: We believe in only using top quality ingredients, so we manufacture right here in the USA. Capsules are veggie-based. Easy to swallow. Dairy Free, Soy Free, Gluten Free and Non-GMO.