About this item 1. Four in 1 COMPOUND FORMULA: Dr. Brian calcium mineral supplement contains 4 main ingridients-calcium 200mg magnesium 200mg zinc 6mg and vitamin d3 400iu, 4 nutrients in 1 tablet that protects your bone and immune health. 2. SUPPORT FOR BONE IMMUNE HEALTH: Calcium Magnesium zinc and vitamin d3 are the basic multiminerals and vitamin that helps for bone immune teeth nerve muscle Health. 3. CALCIUM MAGNESIUM SUPPLEMENT: The nessessory mineral for the structure of bone&teeth function of nerve&muscle. Magnesium:maintenance of the nerve&muscle. 4. VITAMIN D ZINC SUPPLEMENT: vitamin d3 is the normal absorption and utilization of calcium and phosphorus, zinc used for normal immune function. 5. CUSTOMER SERVICE: If you are not 100% satisfied with your item purchase, you may return your items or make way refund.