Vegetables are rich in vitamins, minerals, and dietary fiber. Eating a moderate amount of vegetables can promote intestinal peristalsis, facilitate bowel movements, provide the micronutrients the body needs, exert antioxidant effects, and ensure the normal function of various organs. However, excessive intake of vegetables can lead to the following harms.
Certain vegetables contain high levels of oxalic acid, which can easily form stones.
Vegetables like spinach, celery, and tomatoes contain high levels of oxalic acid, which can combine with calcium from other foods to easily form calcium oxalate stones. This is one of the reasons why many women who prefer a vegetarian diet are prone to stone diseases.
It can aggravate the condition of existing stones.
Most vegetables are alkaline foods. For patients already suffering from calcium phosphate stones, consuming large amounts of alkaline foods daily can increase the number of stones and make them difficult to expel from the body.
They are difficult to digest.
Vegetables high in crude fiber, such as celery and bamboo shoots, are difficult to digest after being consumed in large quantities and are not recommended for patients with gastrointestinal diseases. Crude fiber can also easily cause gastric bleeding or esophageal variceal bleeding in patients with cirrhosis, worsening their condition.
They affect the absorption of calcium and zinc.
For pregnant women and children and adolescents in their growth and development stages, consuming large amounts of vegetables can hinder the body's absorption of calcium and zinc, affecting children's intellectual development and bone growth.
If large quantities of vegetables are consumed for "dieting" or "satiety," reducing or avoiding meat and fish not only affects the body's intake and absorption of essential fatty acids and high-quality protein, leading to protein malnutrition, but it also hinders the absorption of rich nutrients such as calcium, iron, and zinc from non-vegetarian foods. Women should be particularly careful to avoid iron-deficiency anemia and calcium deficiency caused by excessive vegetarianism.