Gold beet with mild flavor and vibrant color retained in cooking. Gold beets are an excellent source of folate, manganese, beta-carotene, and are a very good source of potassium, copper, and fiber. They also contain magnesium, phosphorus, vitamins B6 and C, and iron. Besides supplying good amounts of protein, phosphorus, and zinc, beet greens are also a great source of fiber. Packed with antioxidants, they’re high in vitamin B6, magnesium, potassium, copper, and manganese, and low in fat and cholesterol.