Spinach can be consumed in moderation on a daily basis, and those who suffer from stones are advised to eat less. Spinach is a common green vegetable in life, generally moderate consumption is possible, do not need to deliberately reduce the amount of food. Every 100g of spinach contains 2.4 grams of protein, 0.5 grams of fat, 3.1 grams of carbohydrates, can provide energy and nutrients for the body. There are also minerals such as calcium 66mg, sodium 85.2mg, potassium 311mg and iron 2.9mg, with iron content ranking high among similar foods. Moderate consumption of spinach is beneficial to the human body and can help the body to supplement the appropriate nutrients. However, if consumed in excess, the oxalic acid in spinach will easily combine with calcium to form calcium oxalate. Calcium oxalate is easily deposited to form stones, therefore, it is not recommended to consume too much, and stone patients are recommended to eat less or try not to eat.