Beets are a low-calorie food that is full of vitamins and minerals. Beets are also a source of betaine, an antioxidant that gives the plant roots their rich, red colour. Manganese, folate, and vitamin B2 are also found in large amounts in beetroot.
Beet juice contains 7.8 calories per 31 g serving. This serving contains 0 g of fat, 0.2 g of protein and 1.8 g of carbohydrate. The latter is 1.5 g sugar and 0.3 g of dietary fibre; the rest is complex carbohydrates.