Black wheat is naturally rich in anthocyanins. The colour is due to presence of these pigments.
Anthocyanins are kind of anti-oxidants naturally occurring plant pigments which are generally found in berries, grapes, raisins, etc. Anthocyanins are kind of antioxidants and fighting free radicals and have beneficial properties for the body - making it a healthy option to choose.
They're also good source of other nutrients like : proteins, dietary fibres, vitamins and minerals like vitamin B, folic acid, selenium, magnesium, manganese, zinc, calcium, iron, copper, potassium, fibre, and amino acids.