Nature's Answer, Marine Based Calcium And Magnesium Liquid, 500 / 250 Mg, 16 OzProduct Description Dietary Supplement li> Gluten Free Vegetarian Vegan From Cool, Clean, Pristine, Iceland Arctic Waters Product Benefits Ingredients Supplement Facts Serving Size: 1 Tablespoon (15 ml) Amount Per Serving %DV Calories 10 Total Carbohydrate 8 g 3%* Calcium (from Aquamin Red Algae (from Lithothamnium sp. Thallus) and Seawater)) 500 mg 50% Magnesium (from Aquamin Seawater (Magnesium Hydroxide)) 250 mg 62% Sodium 15 mg 1% *Percent Daily