Watercress leaves are edible, moderate consumption can be supplemented with vitamins and other nutrients, there are some health benefits, most people can consume, there is no should not eat, people allergic to it forbidden to eat. Watercress leaves contain more water, accounting for 89.4%, carbohydrates are the main nutrients, accounting for 5.9%. In terms of vitamins, watercress leaves contain some carotenoids with a content of 1930 micrograms/100g. In terms of minerals, watercress leaves contain a high amount of potassium at 137mg/100g, which ranks fair among similar foods. Moderate consumption of watercress leaves can replenish some of the nutrients needed by the body, but be careful not to eat large quantities. Patients who are allergic to watercress are forbidden to eat, most other people can eat watercress leaves, there is no such thing as inappropriate to eat.