(1) Peptic Ulcer: Patients with severe peptic ulcers should not consume soy products such as soybeans, broad beans, tofu shreds, and dried tofu, as they are high in purines and can promote gastric juice secretion. The dietary fiber in whole beans can also cause mechanical damage to the gastric mucosa. The oligosaccharides in beans, such as stachyose and raffinose, cannot be digested and absorbed by digestive enzymes but can be fermented by intestinal bacteria, producing small-molecule gases, which in turn can lead to symptoms like belching, bowel sounds, bloating, and abdominal pain.
(2) Gastritis: Patients with acute gastritis and chronic superficial gastritis should also avoid soy products to prevent the stimulation of gastric acid secretion and gastrointestinal bloating.
(3) Kidney Disease: Patients with nephritis, renal failure, and those undergoing dialysis should adopt a low-protein diet. To meet the body's basic needs, a limited amount of foods rich in essential amino acids and low in non-essential amino acids should be selected. Compared to animal protein, beans are higher in non-essential amino acids; therefore, they should be avoided.
(4) Diabetic Nephropathy: The main complication causing death in diabetic patients is diabetic nephropathy. When patients have urea nitrogen retention, it is not advisable to consume soy products.
(5) Typhoid Fever: Although patients with long-term high fever from typhoid should consume a high-calorie, high-protein diet, during the acute and recovery phases, to prevent bloating, drinking soy milk should be avoided to prevent gas production.
(6) Acute Pancreatitis: During an acute pancreatitis attack, a high-carbohydrate clear liquid diet can be consumed, but soy milk and other foods that stimulate gastric and pancreatic juice secretion should be avoided.
(7) Gout: The pathogenesis of gout is a disorder of purine metabolism, characterized by hyperuricemia. This disease is more common in affluent families, and high-protein, high-fat diets can easily trigger gout. Food proteins are often combined with nucleic acids to form nucleoproteins, which are then broken down into purines and subsequently into uric acid. Therefore, during the acute phase, foods high in purines must be avoided, including dried beans and soy products. Even during the remission phase, their consumption should be limited.
(8) Galactose and Lactose Intolerance: Because these patients lack enzymes related to the digestion and metabolism of galactose and lactose, foods containing lactose should be avoided in their diet. After being broken down in the intestines, stachyose and raffinose in soy foods can produce some galactose. Therefore, severe patients should avoid soy products to prevent exacerbation of their condition.
(9) Phenylketonuria: This is a common congenital metabolic defect in children. The primary treatment for this condition is to control the concentration of phenylalanine in the blood by consuming specially formulated low-phenylalanine foods, while also avoiding or limiting the intake of protein-rich foods such as soy products and animal-based foods.
Thus, it appears that people should consider their own health conditions when deciding whether or not to consume soy products.