1. Spinach+tofu. Tofu contains magnesium chloride and calcium sulfate, and spinach contains oxalic acid. When two kinds of food meet, magnesium oxalate and calcium oxalate can be produced. These two kinds of white sediments will not only affect the normal absorption of calcium by human body, but also easily lead to stones.

2. Spinach+cucumber. Cucumber contains vitamin C decomposing enzyme, while spinach is rich in vitamin C, so cucumber and spinach can't be eaten at the same time, otherwise the vitamin C in spinach will be destroyed by the decomposing enzyme in cucumber.

3. Spinach+pork liver. Spinach should not be fried with pork liver. Pig liver is rich in copper, iron and other metal elements. Once combined with spinach with high vitamin C content, metal ions can easily oxidize vitamin C and lose its nutritional value. Animal liver, egg yolk and soybean are rich in iron, so it is not suitable to eat with amaranth and spinach containing more oxalic acid. Because both cellulose and oxalic acid will affect the absorption of iron in the above foods.

4. Spinach+milk. Spinach and other fruits and vegetables containing more oxalic acid will combine with calcium to form insoluble precipitate, which will affect the absorption of calcium in milk. So spinach and milk must not be eaten at the same time.

5. Spinach+cheese. Spinach and cheese are very similar. The chemical components contained in cheese will affect the absorption of rich calcium in spinach.