Nutrition Facts (1/2 cup cooked mustard greens)

Calories 11
Dietary Fiber 1.4 grams
Protein 1.6 grams
Carbohydrates 1.5 grams
Vitamin A 2121 IU
Vitamin C 18 mg
Folic acid 130 micrograms
Calcium 52 mg
Iron 0.5 mg
Potassium 140 mg

A member of the cruciferous vegetable family, mustard contains large amounts of beta carotene and vitamin C that are important antioxidants. They contain two glucosinolates with well-documented cancer-preventive and anti-inflammatory properties in levels second only to brussel sprouts and are a source of calcium that can be important to lactose intolerant individuals. Mustard greens also contain a significant amount of iron.

CAUTION: individuals with already existing and untreated kidney or gallbladder problems may want to avoid eating mustard greens because of their oxalate content. Laboratory studies have shown that oxalates may also interfere with absorption of calcium from the body.