Taking calcium tablets is best arranged during or after meals. Generally speaking, calcium tablets need to be broken down into calcium ions under the action of stomach acid before they can be fully absorbed and utilized by the body. Stomach acid secretion occurs only during and for a period of time after meals, so taking calcium tablets during or after meals is more conducive to calcium absorption in the body. It is not recommended to take calcium tablets on an empty stomach to avoid gastrointestinal discomfort. For some people who have gastrointestinal diseases themselves, it is recommended to give priority to food calcium supplementation, and eat some foods with high calcium content, such as milk, soy products, yogurt, etc. In addition, it can be combined with calcium carbonate and calcium lactate under the guidance of a doctor. So usually eat calcium tablets, it is best to take during or after meals, avoid eating calcium tablets on an empty stomach.