Beans are rich in protein. Excessive intake at one time not only hinders the absorption of iron, but also easily leads to symptoms such as abdominal distension and diarrhea.

2, increase the burden on the kidneys

Under normal circumstances, protein, a plant ingested by human beings, is metabolized, and most of it eventually becomes nitrogen-containing waste, which is excreted by the kidneys.

When people reach old age, the function of excreting waste from the kidneys declines. At this time, if you don't pay attention to a healthy diet, you will eat a lot of tofu and consume too much plant protein, which will inevitably lead to an increase in nitrogen-containing waste produced in the body, which will increase the burden on the kidneys and be detrimental to your health.

3. Promote the formation of arteriosclerosis

Soybean products are rich in methionine, which can be converted into cysteine under the action of enzymes. Cysteine can damage endothelial cells on the arterial wall, which can easily deposit cholesterol and triglycerides on the arterial wall and promote the formation of arteriosclerosis.

4. Lead to iodine deficiency.

Saponins in soybean can not only prevent atherosclerosis, but also accelerate the excretion of iodine in the body. Long-term excessive consumption of tofu can easily lead to iodine deficiency, leading to iodine deficiency disorders.

5, promote gout attack

Tofu contains more purines, and gout patients with abnormal purine metabolism and patients with elevated blood uric acid concentration are prone to gout attacks, especially gout patients should eat less.