Watercress is a member of the cabbage family along with other greens such as mustard greens, kale, kohlrabi, and turnip greens. Watercress offers similar health benefits as kale and collards and can be used in the same way.
Watercress and other cabbage greens are among the most highly nutritious vegetables. They provide an excellent source of vitamins B6, C, manganese, and carotenes. Greens in the cabbage family also provide a Very good source of fiber, iron,copper, and calcium. In addition, the greens are a very good source of vitamins B1, B2, and E.
Greens in the cabbage family have almost three times as much calcium as phosphorus. That is a very beneficial ratio since high phosphorus consumption has been linked to osteoporosis. The high consumption reduces the utilization of calcium and promotes it’s excretion. As members of the cabbage family, watercress, kale, collards, mustard greens, kohlrabi, and turnip greens contain the same sort of anticancer properties.