Cowhide is a kind of vegetable that farmers in southwest China love to eat, which contains B vitamins and cellulose needed by human body, but it is harmful for fracture patients to eat it. Because cowhide contains a lot of oxalic acid, when oxalic acid meets calcium in human body, it will react chemically to produce insoluble salt substance-calcium oxalate. This substance not only hinders the absorption and utilization of calcium in food, but also dissolves calcium in bones, making patients more calcium-deficient, thus affecting fracture healing.

Vinegar is a good condiment in people's daily life, which has the function of strengthening the spleen and appetizing, but it is best not to use vinegar for fracture patients. This is because vinegar contains 2% ~ 3% acetic acid, which can soften and decalcify bones. Clinical practice has found that many fracture patients will feel sore or even swollen the next day after eating vinegar. A large number of cases have confirmed that vinegar can really affect fracture healing, so it is best for fracture patients to avoid eating vinegar and cowhide during treatment.