Liquid Calcium Magnesium provides a 1:1 ratio of calcium citrate to magnesium with a light berry flavor. Each tablespoon provides 500 mg of calcium and magnesium in absorbable citrate form. Liquid Calcium Magnesium also contains cholecalciferol (vitamin D3) and boron for additional support. This formula is xylitol-free and does not contain vitamin K. A 1:1 ratio of calcium to magnesium allows proper absorption of both minerals. The form of calcium allows it to be taken with or without food.