Do Not Eat Cucumber and Tomato Together
Many restaurants serve a dish called "Great Harvest," combining carrots, lettuce, tomatoes, cucumbers, and other vegetables eaten raw with dipping sauce. Eating vegetables raw helps preserve nutrients, but adding cucumber significantly reduces the nutritional value. While cucumber itself is delicious and nutritious—crisp, juicy, sweet, aromatic—it contains protein, fat, carbohydrates, various vitamins, fiber, and abundant calcium, phosphorus, iron, potassium, sodium, and magnesium. Especially, its fine cellulose helps lower cholesterol and triglyceride levels in blood, promotes intestinal movement, accelerates waste elimination, and improves metabolism. Fresh cucumber also contains prolin diacid, which effectively inhibits conversion of sugars into fat, thus aiding weight loss and preventing coronary heart disease.
Why should cucumber be avoided in "Great Harvest"? Because cucumber contains vitamin C-degrading enzyme that destroys vitamin C in other vegetables. Tomatoes, rich in vitamin C, lose their nutritional benefit when eaten with cucumber due to this enzyme. Besides "Great Harvest," many people eat cucumber followed by tomato, or have "tomato omelet" and "cucumber stir-fry" at the same meal—these combinations are inappropriate. The higher the vitamin C content in food, the greater the damage caused by cucumber’s enzyme.
Vegetables high in vitamin C—such as chili peppers, cauliflower, Chinese broccoli, and bitter melon—should also not be consumed with cucumber.
Vitamin C is essential for human health, enhancing immunity, preventing scurvy, and resisting infections. Severe deficiency may lead to gum bleeding, subcutaneous bleeding, nosebleeds, and excessive menstruation. A major source of vitamin C is vegetables and fruits. Therefore, while increasing intake of these foods, avoid pairing them with cucumber to preserve nutritional value.
What pairs well with cucumber? In southern China, people often cook eel with cucumber. Try this recipe: about 300 grams of fresh eel slices, cut into 5 cm segments; cucumber sliced. Heat oil in a wok until slightly smoking, stir-fry eel until tender, add garlic slices, ginger threads, and cucumber, then salt, monosodium glutamate, and broth. Simmer until soup turns milky white, add perilla leaves, bring to boil, skim off foam, pour into bowls, sprinkle with green onions and pepper powder. This dish is nutritious, light, refreshing, and delicious.
From a TCM perspective, cucumber is cold in nature and sweet in taste, capable of generating fluids, quenching thirst, relieving irritability and summer heat, reducing swelling and promoting urination. It treats sore throat and limb edema. However, due to its cold nature, those with spleen-stomach deficiency-cold causing stomach pain or chronic diarrhea should consume less.