WHAT MAKES BUCKWHEAT SO SPECIAL? Buckwheat is considered one of the most useful food plants on earth. It has more minerals than most other cereals. Buckwheat is high in fiber, antioxidants and all the essential amino acids. RICH IN MINERALS AND VITAMINS. Buckwheat is rich in copper, iron, manganese, magnesium, phosphorus, vitamins B3 and B2, iron, potassium, zinc, selenium and pantothenic acid (B5). SOURCE OF FIBER. The fiber in buckwheat is released over a long period of time, thus giving a longer feeling of fullness compared to wheat or oats. Buckwheat has a lower GI index which does not cause large fluctuations in blood sugar levels.