Yes, as far as I know, beetroot works on dark circles under the eyes.Beetroot contains potassium, magnesium and iron as well as vitamins A, B6 and C, and folic acid. Beets also contain carbohydrates, protein, powerful antioxidants and soluble fibre. Some of those nutrients, such as Vitamin A Vitamin C folic acid and powerful antionxidants are very good for lessening dark ciecles under the eyes. So, just add some beetroot into you diet and ensure you intake it properly. Actually beetroot will not only reduce the dark circles, but also reduce fine lines and wrinkles.