Watercress can be eaten raw, but it is generally not recommended. Watercress belongs to the wild vegetables containing oxalic acid, watercress generally grows in swamps, river ditches, paddy field edge, in the process of growth, there may be some soil, bacteria, parasites and other things into the rhizomes and leaves, and eaten raw there will be a bitter taste, it is not recommended to eat, such as the need to eat raw, you need to clean, soak in brine, of course, boiled and eat will be safer and healthier. In addition, watercress is rich in vitamin B ₁, vitamin B ₂, chlorophyll and other nutrients, the leaves contain high calcium (per 100g of watercress contains about 153mg of calcium, higher than the milk), can be supplemented to the human body needs. Watercress leaves contain volatile substances, consumption can also enhance the appetite, for partiality anorexia effect is more obvious. In addition to a healthy diet in daily life, you should exercise appropriately, which is beneficial to the body.