Swiss chard is a green that is closely related to beets. The same betacyanins and betaxanthins found in beets are found in chard. Swiss chard also contains antioxidant phenols and flavonols, which have been shown in the laboratory to inhibit the growth of some types of cancer cells.
Chard is an excellent source of vitamins C, E, and K, and the minerals potassium, magnesium, iron, and manganese. It also provides the B vitamins B6, thiamine, niacin, and folic acid, and the minerals calcium, selenium, and zinc. It is a good source of carotenes and fiber. With 27.4 percent of the recommended daily value for potassium and 47 percent of the recommended daily value for magnesium in a one-cup serving, chard helps keep blood pressure down.
Swiss chard does contain measurable amounts of oxalates, so over-consumption can cause problems for those with kidney disease, gout, vulvar pain, rheumatoid arthritis, or other conditions that may require a low-oxalate diet.Nutritional Facts
One-half cup of boiled, chopped Swiss chard provides 18 calories, 3.6 g carbohydrate, 1.7 g protein, 0.1 g fat, 1.8 g dietary fiber, 2762 IU vitamin A, 16 mg vitamin C, 8 mcg folic acid, 483 mg potassium, 158 mg sodium, 29 mg phosphorus, 51 mg calcium, 2 mg iron, and 76 mg magnesium.