Kirkman Calcium-Magnesium Liquid with Vitamin D - 16 oz is a delicious, non-gritty, and stable formula of calcium and magnesium. It also contains Vitamin D which has a vital role in calcium absorption. This is derived from premium quality of calcium compounds that either meets or surpasses the governmental criteria for purity including heavy metals. This product may be taken into the body by mixing it with your favorite drinks. Be careful when adding it to a soda because it will effervesce a lot.