While tofu is nutritious, it should not be consumed daily, nor should large quantities be eaten at once. According to Traditional Chinese Medicine (TCM), tofu is considered to have a "cold" nature. Therefore, individuals with a cold stomach, those prone to diarrhea, bloating, a weak spleen, and those with kidney issues manifesting as frequent nocturnal emissions should avoid excessive consumption.
Tofu is one of the most widely used and popular cooking ingredients, made from soybeans, green beans, or black beans through a process of soaking, grinding, filtering, boiling, coagulating, and forming. The protein content in tofu and tofu products is higher than that in soybeans itself. Furthermore, tofu protein is a complete protein, containing all eight essential amino acids in proportions that closely match the body's needs, making it highly nutritious.
Tofu also contains fats, carbohydrates, vitamins, and minerals. TCM theory posits that tofu has a sweet flavor and cool nature, and it acts on the spleen, stomach, and large intestine meridians. It is believed to have the effects of replenishing Qi, harmonizing the middle, promoting the production of body fluids, moistening dryness, and clearing heat and toxins. It can be used to treat red eyes, thirst, and to counteract the effects of sulfur and alcohol poisoning. However, despite its benefits, excessive consumption of tofu can be detrimental and harmful to health.
1. It can accelerate renal decline
Under normal circumstances, the plant protein ingested by the body is metabolized and converted into nitrogenous waste, which is then excreted by the kidneys. As people age, their kidneys' ability to expel waste decreases. If diet is not managed carefully and excessive tofu is consumed, leading to an intake of too much plant protein, it will inevitably increase the amount of nitrogenous waste in the body. This加重 the burden on the kidneys, further accelerating renal decline, which is detrimental to health.
2. 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 lead to protein indigestion, resulting in discomfort such as bloating and diarrhea.
3. It can promote the formation of arteriosclerosis
American medical experts point out that soy products contain a high level of methionine. Under the action of enzymes, methionine can be converted to homocysteine. Homocysteine can damage the endothelial cells of the arterial walls, making it easier for cholesterol and triglycerides to deposit on them and thus promoting the formation of arteriosclerosis.
4. 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 body. Long-term excessive consumption of tofu can easily lead to iodine deficiency, causing iodine deficiency disorders.
5. It can trigger gout attacks
Tofu contains a significant amount of purines. Individuals with gout, where purine metabolism is abnormal, and those with high blood uric acid levels are prone to gout attacks if they consume too much tofu. Gout sufferers, in particular, should limit their intake.
In conclusion, while tofu is beneficial, it should not be eaten daily or in excessive amounts. The elderly and individuals with kidney disease, iron-deficiency anemia, gout, or arteriosclerosis should be especially mindful of their consumption. According to TCM, tofu's "cold" nature makes it unsuitable for excessive consumption by those with a cold stomach, those prone to diarrhea and bloating, individuals with a weak spleen, and those with kidney issues characterized by frequent nocturnal emissions.