Spinach belongs to a kind of food, does not have any effect, but can be supplemented with carbohydrates and other nutrients; eaten in moderation, there is no contraindication when cooking reasonably. Spinach contains protein, dietary fiber, carbohydrates, sodium and other nutrients, each 100 grams of spinach contains 17 calories, of which 3.35 grams of carbohydrates, 1.25 grams of protein, 0.2 grams of fat, Vitamin A487IU, Vitamin C6.5mg, Calcium 52mg, Iron 0.83mg. Moderate consumption of spinach can replenish the nutrients needed by the body and maintain the normal physiological function of the body. Spinach contains a relatively high content of oxalic acid, after a large amount of consumption can be in the body with calcium elements to form calcium oxalate, easy to precipitate the formation of stones. So for patients with urinary tract stones, kidney stones, bladder stones, etc. can blanch spinach before intake to remove some of the oxalic acid, more beneficial to the body.