Problem 1: Causes indigestion: Tofu is rich in protein. Eating too much at a time not only hinders the absorption of iron, but also easily leads to protein's indigestion, abdominal distension, diarrhea and other uncomfortable symptoms.

Question 2: Promoting the decline of renal function: Under normal circumstances, protein, a plant that people eat in the body, undergoes metabolic changes and most of it becomes nitrogen-containing waste, which is excreted by the kidneys. When people get old, the ability of the kidneys to excrete waste decreases. At this time, if you don't pay attention to your diet, eat a lot of tofu, and eat too much protein, it will inevitably increase the nitrogen-containing waste produced in your body, increase the burden on your kidneys, and further reduce your renal function, which is not conducive to your health.

Question 3: Promote the formation of arteriosclerosis: American medical experts point out that soy products are rich in methionine, which can be converted into cysteine under the action of enzymes. Cysteine can damage endothelial cells of arterial wall, and it is easy to deposit cholesterol and triglyceride on arterial wall, thus promoting the formation of arteriosclerosis.

Question 4: Lead to iodine deficiency: Soybeans that make tofu contain a substance called saponin, which can not only prevent atherosclerosis, but also promote the excretion of iodine in the human body. Long-term excessive consumption of tofu can easily lead to iodine deficiency, leading to iodine deficiency disorders.

Question 5: Promote gout attack: Patients with gout whose tofu contains more purines, whose purine metabolism is abnormal, and whose blood uric acid concentration is increased are prone to gout attack, especially those with gout should eat less.