Calcium exists in the human body mainly in the form of bones and teeth, and we all know that calcium in teeth is the most difficult to make up, although our teeth will fall out when we get old, but calcium supplementation should not be ignored. The usual method of calcium supplementation in daily life is just to drink milk, eat calcium tablets or bone broth, but the effect of these calcium supplements is very slow. So, which calcium supplementation methods have the best effect? The elderly must know the five techniques of calcium 1, homemade “high calcium vinegar” in cooking bone broth or meat stew, add some vinegar, can accelerate the precipitation of calcium. You can make your own “high-calcium vinegar” by soaking the shells of boiled eggs in vinegar for a few minutes, and the shells will slowly dissolve, even without any residue, so that you can get about 1,800 mg of calcium (the World Health Organization specifies that the preventive dosage of calcium is 500 mg/day and the therapeutic dosage is 1,000 mg/day). When stir-frying, you can use this high-calcium vinegar. 2, make good use of dairy products into dishes Many people are lactose intolerant, so try adding dairy products into dishes. Use low-fat milk powder instead of flour, and milk instead of water. For example, when stewing beef, add fresh milk to increase the flavor; when steaming egg custard, use milk instead of plain water to increase the smooth texture. Summer often eat salads, try using plain yogurt instead of salad dressing. 3, snacks can also be supplemented with calcium legumes and seed foods can also provide rich calcium, like soybeans, lotus seeds, sesame seeds, dates and raisins. Parents to prepare snacks for children, may wish to use seaweed, almonds, pistachios instead of chocolate and potato chips. 4, eat more small fish and seaweed Known for their longevity, the Japanese do not often drink milk, but rarely lack of calcium, mainly due to their frequent consumption of fish and shrimp. Want to rely on fish and shrimp calcium, preferred small fish and shrimp, such as small dried fish, canned sardines and shrimp, with the bones and skin eaten as a whole, calcium better. In addition, seaweed, seaweed and other algae, is also a very good calcium food. 5, don’t forget to supplement vitamin D. Calcium needs vitamin D to be absorbed by the small intestine and transported to the bones via the blood. Its best source is fat-rich fish, like eel and salmon, followed by egg yolk and milk. There are also shiitake mushrooms, which can be left in the sun for 1-2 hours before cooking to produce a lot of vitamin D, which can then be combined in different dishes to help the absorption of calcium.