Tofu is a widely popular and versatile cooking ingredient, made from raw materials such as soybeans, green beans, and black beans through a series of processes including soaking, grinding, filtering, boiling, adding a coagulant, solidifying, and shaping.
The protein content in tofu and tofu products is higher than that in soybeans. Moreover, tofu protein is a complete protein, containing all eight essential amino acids required by the human body in proportions that closely match human needs, giving it a high nutritional value. Tofu also contains fats, carbohydrates, vitamins, and minerals. According to traditional Chinese medicine theory, tofu is sweet in taste and cool in nature, and it affects the spleen, stomach, and large intestine meridians. It is believed to have the effects of replenishing Qi, harmonizing the middle energizer, promoting the production of body fluids, moistening dryness, clearing heat, and detoxifying. It can be used to treat conditions such as red eyes, thirst, and to counteract toxins from sulfur and liquor. However, although tofu is beneficial, excessive consumption can lead to the following harms. It can cause indigestion.
Tofu is extremely rich in protein. Consuming too much at once not only hinders the body's absorption of iron but can also easily lead to protein indigestion, resulting in discomfort symptoms such as bloating and diarrhea. It can promote renal function decline.
Under normal circumstances, the plant protein ingested by the body undergoes metabolic changes, with most of it eventually becoming nitrogenous waste excreted by the kidneys. As people age, the kidneys' ability to excrete waste decreases. If one does not pay attention to their diet and consumes large amounts of tofu, leading to excessive intake of plant protein, it will inevitably increase the amount of nitrogenous waste produced in the body,加重 the burden on the kidneys, further decline renal function, and be detrimental to health. It can promote the formation of arteriosclerosis.
American medical experts point out that soy products contain extremely high levels of methionine, which can be converted to cysteine under the action of enzymes. Cysteine can damage the endothelial cells of arterial walls, making it easy for cholesterol and triglycerides to deposit on the arterial walls and promoting the formation of arteriosclerosis. It can lead to iodine deficiency.
The soybeans used to make tofu contain a substance called saponin, which not only helps prevent atherosclerosis but also promotes the excretion of iodine in the human body. Long-term excessive consumption of tofu can easily lead to iodine deficiency, causing iodine deficiency diseases. It can trigger gout attacks.
Tofu contains a relatively high amount of purines. Gout patients with abnormal purine metabolism and patients with elevated blood uric acid levels are prone to gout attacks if they consume too much, especially gout patients who should eat it in moderation.
In conclusion, while tofu is good, it should not be eaten daily, and consumption at one time should not be excessive. The elderly and patients with kidney disease, iron-deficiency anemia, gout, and arteriosclerosis should especially control their intake. According to traditional Chinese medicine, tofu is considered to have a cold nature. Therefore, individuals with a cold stomach, those who are prone to diarrhea, bloating, or have a weak spleen, as well as those with kidney deficiency who often experience nocturnal emissions, should also not consume it in large quantities.