Celery is a marshland plant in the family Apiaceae that has been cultivated as a vegetable since antiquity. Celery has a long fibrous stalk tapering into leaves. Depending on location and cultivar, either its stalks, leaves or hypocotyl are eaten and used in cooking. Celery seed powder is used as a spice.
Although celery has a high water content, it contains numerous vitamins and minerals, including potassium and calcium, which are important for heart health. It also contains folate and vitamin K, both of which are required for the formation of red blood cells and effective blood clotting.