Spinach is best not eaten raw, raw spinach can increase the probability of urinary stones, affect the body’s absorption of iron, and may lead to acute gastroenteritis, therefore, it is best to eat after high temperature heating. Spinach is rich in oxalic acid, oxalic acid can be combined with calcium, the formation of calcium oxalate stones, but oxalic acid can be decomposed at high temperatures, so after heating blanching treatment of spinach, oxalic acid content is lower; raw spinach can lead to excessive intake of oxalic acid, affecting the human body on the absorption of iron. In addition, spinach that has not been processed by heating and high-temperature disinfection may contain certain viruses and bacteria, which may lead to bacterial or viral infections and acute gastroenteritis after eating it raw, resulting in vomiting, diarrhea and other symptoms, so it should not be eaten raw either. If you need to consume spinach, please heat and blanch it thoroughly before consumption.