When it comes to calcium supplements, many people will think of white calcium tablets or calcium carbonate powder. Even foods rich in calcium are often mentioned as white milk and tofu. . But in fact, among the foods with high calcium content, except for dried shrimps, most of them look very dark. Foods with a calcium content greater than 300 mg per 100 grams of food include kelp, seaweed, nostoc, black fungus, black sesame and other black foods. Some even have a calcium content of thousands of milligrams, while the calcium content of milk is only at a moderate level. , containing about 100 mg of calcium per 100 grams. Wang Zhijin, chief physician of the Gastroenterology Department of the People's Liberation Army 305 Hospital, said that the calcium content of these black foods is indeed high, but because the texture and taste are inferior to milk, some people, especially teenagers, do not like to eat them. Moreover, calcium supplementation cannot only look at the calcium content. The most important thing is the absorption of the human body. At this point, the advantages of milk are very obvious. Each food has different nutrients. While milk supplements calcium, it can also provide a large amount of protein, amino acids, fats and multivitamins. Kelp is rich in iodine. Black fungus has now become an effective preventive medicine. One of the foods for cerebrovascular disease. However, each food also has some disadvantages. For example, many people are lactose intolerant to milk, and seafood generally has a high salt content. Overeating it is not good for human health. Director Wang Zhijin believes that no matter what food, a balanced diet is the most important. Of course, different people can choose some foods according to their own specific conditions, which not only supplement calcium but also meet 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 can Eat more black fungus, etc. Some people take extra vitamin D to promote calcium absorption, but Director Wang said it is not necessary. Because the human body itself contains enough vitamin D, it needs to be exposed to the sun to be converted into activated vitamin D that is beneficial to calcium synthesis. The activated vitamin D synthesized by bathing in the sun for a day is enough to meet the body's needs for several days. Therefore, as long as you take a short period of time every day to exercise outdoors, you will not only ensure the sun exposure, but also get physical exercise, and the exercise itself can also increase the activity of calcium, accelerate its metabolism, and promote absorption. Foods rich in calcium include the following categories Available for selection: Milk whole milk powder: calcium content is 1030 mg/100g; cheese: 590 mg/100g; milk: 120 mg/100g. Soy products: soybeans: 367 mg/100g; northern tofu: 777 mg/100g; southern tofu: 240 mg/100g. Seafood fish meal: 7705 mg/100g; fish floss: 3970 mg/100g; dried shrimps: 2000 mg/100g; dried shrimps: 882 mg/100g; kelp: 348 mg/100g; sea cucumber: 285 mg/100g ; Seaweed: 264 mg/100g; Cooked dried fish: 257 mg/100g. Other sesame paste: 870 mg/100g; tea: 325 mg/100g; daylily: 301 mg/100g; fungus: 247 mg/100g; watermelon seeds: 237 mg/100g; pumpkin seeds (fried): 235 mg /100g; celery: 187mg/100g; peanut kernel: 119mg/100g.