Calcium in bones will never dissolve easily. Experiments show that after cooking in the pressure cooker for two hours, the fat in the bone marrow has surfaced, but there is still little calcium in the soup. There is only one way to supplement calcium in bone soup: add half a bowl of vinegar and stew for an hour or two on low heat. When stewing bone soup, break the washed bones and burn them in cold water. Add enough cold water at one time, and slowly heat it, so that protein can be fully dissolved in the soup, and the soup will taste more delicious. In addition, after the water is boiled, you can add a little vinegar to dissolve the phosphorus and calcium in the bones in the soup.

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But this is not an effective way to increase calcium absorption. The acidic environment formed by vinegar in bone soup is really beneficial to the dissolution of calcium in bones. However, when cooking bone soup at home, in order to obtain a suitable taste, the amount of vinegar is generally not too much, and the vinegar will be partially volatilized under the action of high temperature, so the amount of vinegar dissolved in bone soup itself is very small, and the amount of calcium that can be dissolved is also very small. Scientists have done experiments to add vinegar with the most acceptable acidity to bone soup. The calcium content in bone soup is only 5 ~ 10 mg/100 g, which is only 1/ of the calcium content in fresh milk (80 ~100mg/100g). According to a bowl of bone soup weighing 300 g, the calcium content is about 30 mg at most, which is only the daily requirement of pregnant women. In addition, the absorption of calcium needs the participation of vitamin D, and the content of vitamin D in bone soup is very small, which can not effectively convert bone calcium into calcium absorbed by human body.

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Therefore, vinegar in bone soup is really beneficial to the dissolution of calcium and increase the flavor of soup, but it is not only vinegar that can supplement calcium. Instead of counting on bone soup to supplement calcium, drink a glass of milk!