Foods with high calcium content: 1, milk and dairy products, such as milk, goat's milk, mare's milk, yogurt, milk powder and cheese, which are rich in calcium. 2. Beans and bean products, such as soybeans, mung beans, black beans, red beans, tofu, soybean milk and bean skin, are also rich in calcium. 3. Dark green vegetables, such as coriander, Chinese cabbage, green vegetables, celery, chrysanthemum, oily wheat and lettuce, also contain a lot of calcium.

Calcium is one of the most widely distributed elements in the biosphere, second only to iron, aluminum, silicon and oxygen, accounting for about 3% of the earth's crust. It exists as a compound, such as limestone and marble, gypsum, etc. Calcium is an important component of human body. Normal people contain 1000- 1200g of calcium. Of which 99. 3% concentrated in bone and tooth tissue, only 0. 1% calcium exists in extracellular fluid, and the total calcium content in soft tissues of the whole body accounts for 0. 6%-0。 9% (mostly isolated in intracellular calcium storage vesicles). Calcium in bones and teeth is in mineral form, while calcium in soft tissues and body fluids exists in free or combined form. This part of calcium is collectively called miscible calcium pool. Calcium in the body, on the one hand, constitutes bones and teeth, on the other hand, participates in various calcium physiological functions and metabolic processes.

What are the functions of calcium?

1, constitute bones and teeth

2. Maintain the normal physiological state of all cells, such as the normal beating of the heart;

3, control nerve sensitivity and muscle contraction, such as: reducing leg cramps and helping muscles relax;

4, help blood coagulation;

5. Relieve premenstrual symptoms;

6. Reduce fatigue and accelerate energy recovery;

7. Enhance the body's resistance.