If you want to make full use of spinach and absorb its nutrition, you must pay attention to the following: First, you should not eat spinach with cucumber. There will be vitamin C decomposing enzymes in cucumber, which will destroy the vitamin C in spinach. Second, the cooking time should not be too long, because vitamin C is easy to oxidize when it is hot. Third, spinach contains more oxalic acid, which is not a nutrient needed by the human body. Excessive intake of oxalic acid will hinder the body's absorption of calcium and form insoluble calcium oxalate precipitation, so blanch the spinach with boiling water before eating to remove most of the oxalic acid without losing carotene. Fourth, the inorganic iron contained in spinach is an important component of hemoglobin and myoglobin. We should better absorb the inorganic iron in spinach and eat more high-protein food when eating spinach. Fifth, spinach should not be cooked with tofu, because oxalic acid is most likely to form kidney calculi or bladder stones when combined with calcium in human body. If some calcium content is appropriately increased in food, the formation of stones can be prevented, and it is best to combine spinach with sardines or milk, carrots, oranges, etc. In addition, you should also pay attention to eating spinach. Eating spinach in the morning can remove blood stasis, eating it at noon can enrich blood, and eating it at night can produce calcium deposition. Although spinach can keep fit, patients with stomach deficiency and cold and diarrhea should eat less.