Calcium citrate Calcium Magnesium Zinc Vitamin D3 tablets, super large bottle of 500 pieces, take 2 pieces with meals. Calcium citrate is easier for the human body to absorb, and it is less likely to form stones, and it also contains added vitamins D3, B6 a variety of trace elements such as magnesium and zinc, suitable for any group of people, teenagers who are growing up, and the elderly, calcium tablets can not be less oh~ tablets a day, with meals.