There is no time limit for taking calcium tablets, you can take them at any time of the day, usually the morning oral effect is better. After taking calcium tablets orally, there is a process of absorption in the gastrointestinal tract of the human body, and after taking them orally in the morning, through the daily activities of the human body, it can be more conducive to the absorption of the intestinal tract. At the same time, daytime exposure to sunlight forms vitamin D combined with calcium, which helps the absorption of calcium. Therefore, it is possible to receive sun exposure for at least one hour during the day. In addition, while taking calcium tablets orally, it is also important to take calcium containing foods such as beans, milk, eggs, lean meat, shrimp, and fish in your diet. If the blood calcium is high, it may cause excessive ossification of ligamentous tissue and stones, so avoid excessive supplementation.