Celery and cucumber: Cucumber contains vitamin C decomposing enzymes. Because cucumbers are mostly cooked raw or cold, the enzymes are not lost. If they are eaten with celery, the vitamin C in celery will be decomposed and destroyed, so the nutritional value will be greatly reduced.

Cucumber and citrus can't be eaten * * *: Citrus also contains vitamin C, about 25mg per100g. When making western-style salads, it is sometimes accompanied by cucumber to make the color gorgeous, but the vitamin C in citrus is easily destroyed by the decomposing enzymes in cucumber.

Cucumber and pepper can't be eaten: pepper is rich in vitamin C, which is about198mg per100g. Cucumber contains vitamin C-decomposing enzyme, which does not lose its activity when eaten raw. If they are eaten together, the vitamin C in pepper will be destroyed, which reduces the nutritional value.

Cucumber and tomato should not be eaten together: every100g of tomato contains 20 ~ 33 mg of vitamin C. In order to protect the vitamin C in it, it is not suitable to eat with cucumber or stir-fry with it. Because the decomposing enzyme in cucumber can destroy vitamin C in tomato.

Cucumber is not suitable for food with spinach and Chinese cabbage: the content of vitamin C in spinach is 90 mg per100g, and that in Chinese cabbage is 60 mg per100g, so it is not suitable for food with cucumber, otherwise, the nutritional value will be reduced.