Tofu is one of the most common and popular cooking ingredients, processed from raw materials such as soybeans, green beans, and black beans through a series of procedures including soaking, grinding, filtering, boiling, fine-grinding, coagulation, 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, with a ratio that closely matches the body's needs, giving it a high nutritional value. Tofu also contains fats, carbohydrates, vitamins, and minerals. According to Traditional Chinese Medicine (TCM) theory, tofu is sweet in flavor and cool in nature, and it affects the spleen, stomach, and large intestine meridians. It has the effects of replenishing Qi, harmonizing the middle, promoting the production of body fluids, moistening dryness, clearing heat, and detoxifying. It can be used to treat conditions such as red eyes, diabetes, and to counteract the toxicity of sulfur and alcohol. However, although tofu is beneficial, excessive consumption can be detrimental to health.
Problem 1: 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, causing discomfort symptoms such as bloating and diarrhea.
Problem 2: Promoting Kidney Function Decline
Under normal circumstances, plant proteins consumed by the body undergo metabolic changes, and most are eventually excreted as nitrogenous waste by the kidneys. As people age, the kidneys' ability to excrete waste decreases. At this time, if one does not pay attention to their diet and consumes large amounts of tofu, leading to an excessive intake of plant protein, it will inevitably increase the amount of nitrogenous waste in the body,加重 the burden on the kidneys, further decline kidney function, and be detrimental to health.
Problem 3: Promoting Atherosclerosis
American medical experts point out that soy products contain extremely high levels of methionine. Under the action of enzymes, methionine can be converted to cysteine. 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 atherosclerosis.
Problem 4: Leading to Iodine Deficiency
Soybeans used to make tofu contain a substance called saponin. Saponin not only helps prevent atherosclerosis but also promotes the excretion of iodine in the body. Long-term excessive consumption of tofu can easily lead to iodine deficiency, causing iodine deficiency disorders.
Problem 5: Triggering Gout Attacks
Tofu contains a relatively high amount of purines. Gout patients with abnormal purine metabolism and patients with high blood uric acid levels are more likely to experience gout attacks if they consume too much. Gout patients, in particular, should eat it in moderation.
Therefore, while tofu is good, it is not advisable to eat it every day, nor should the consumption amount be excessive at one time. Older adults and patients with kidney disease, iron-deficiency anemia, gout, or atherosclerosis should especially control their intake. According to TCM, tofu has a cool nature. People with a cold stomach, those who are prone to diarrhea, bloating, or a weak spleen, and individuals with kidney deficiency who often experience nocturnal emissions should also not consume it in large quantities.