Some common ways to promote calcium absorption are calcium supplementation before bedtime, vitamin D supplementation, magnesium supplementation, appropriate sun exposure and physical exercise. 1. Calcium supplement before bedtime: blood calcium level will be lower at night, take calcium tablets 2~3 hours before bedtime to reduce bone calcium loss, absorption will be better; 2. Supplementary vitamin D: vitamin D can promote calcium absorption, but also can regulate the ratio of calcium and phosphorus, so you want to promote calcium absorption, usually pay attention to supplement vitamin D, such as appropriate intake of animal offal, fish, egg yolks, cod liver oil and other vitamin D-rich foods; 3. Supplemental magnesium: magnesium can also promote calcium absorption and metabolism, so usually also pay attention to the intake of magnesium-rich foods, such as almonds and green vegetables; 4. Appropriate sun exposure: appropriate sun exposure can promote the body’s vitamin D synthesis, is conducive to the absorption of calcium, the general recommendation is to sunbathe for about 15 to 20 minutes a day; 5. Physical exercise: appropriate physical exercise is also conducive to calcium absorption, to help prevent calcium loss. It is recommended to eat more calcium-rich foods, if necessary, under the guidance of a doctor to take calcium supplements to supplement, such as calcium carbonate and calcium lactate, etc., and usually pay attention to balanced nutrition, do not picky eating.