Watercress is a water-loving perennial in the Brassicaceae family, which
includes radish, and mustard. Like its botanical relatives, watercress has a
pepper-like and mildly spicy aroma and flavor.
Because watercress is also
abundant in vitamins A and C, folic acid, calcium and iron, the powdered herb is
typically encapsulated as a dietary supplement. As with all supplements, check with your
physician if you take pharmaceutical medications before using this herb because
watercress is known to interfere with medicines metabolized in the liver by CYP
450 enzymes.