Foods containing more than 300mg of calcium per 100g include black foods such as kelp, laver, Nostoc flagelliforme, auricularia auricula, black sesame, etc., and some even contain thousands of mg of calcium, while the calcium content of milk is only at a medium level, with the calcium content of about 100g. Of course, different people can choose some foods according to their own specific conditions, which not only supplements calcium, but also meets other needs of the body. For example, teenagers can insist on drinking milk every day, middle-aged and elderly women eat more soy products, and the elderly eat more black fungus.

Second, exercise more.

Because the human body itself contains enough vitamin D, it can only be converted into active vitamin D which is beneficial to calcium synthesis after sun exposure. Active vitamin D synthesized by bathing in the sun for one day is enough to meet the needs of the body for several days. Therefore, as long as you take a short time out for outdoor exercise every day, you can not only ensure sun exposure, but also exercise, and exercise itself can increase the activity of calcium, accelerate its metabolism and promote its absorption.