1, zucchini. Broccoli is rich in vitamin C. When encountering vitamin C decomposing enzymes contained in zucchini, it will affect the absorption of vitamin C by human body and reduce the nutritional value of broccoli.

2. milk. Eating broccoli immediately after drinking milk will affect the absorption of calcium, and eating the two foods together will reduce the nutritional value.

3. Animal liver. For example, pig liver, chicken liver and broccoli are rich in dietary fiber, which will combine with copper, iron and zinc in animal liver to form indigestible substances, thus affecting human absorption.