If you eat a lot of tofu regularly, it can easily induce kidney stones. Soybeans contain a lot of oxalic acid and are high in purine and calcium. When tofu is processed again, the ingredients will not change much. Therefore, the amount of oxalic acid ingested in the body will be relatively high, and oxalic acid is the most important cause of stone formation. Tofu is a nutritious food, rich in high quality protein, which is easily absorbed by the body. However, because tofu contains certain brine salt components, excessive use can lead to calcium deposits and increase the patient’s risk of developing stones. While it is okay for ordinary people to eat tofu in moderation at three meals, patients who already suffer from kidney stones need to be cautious when consuming tofu. Tofu is rich in protein, and its long-term use will increase the burden on the kidneys and further degrade their function, which is not good for health. In particular, tofu contains a large amount of purine substances, which should be consumed with caution by gout patients.