Network mapping ■ oxalic acid in spinach will be greatly reduced during cooking and heating, so there is no need to worry about stones ■ pregnant women do not have to avoid eating spinach, because spinach contains folic acid in addition to oxalic acid ■ the iron supplement effect of eating spinach is not good, because the iron contained in spinach is non heme iron, and the absorption and utilization rate of this iron by the human body is very low Some people say that spinach can’t be eaten wi...