Nutrition Low Carb buckwheat porridge from the GreenFood brand is made from a mixture of buckwheat flour, dried rice syrup, rice starch and rice flour. Nutriz and erythritol, which has a low glycemic index, are used as sweeteners. Porridge is ideal for breakfast, as it does not take too much time to prepare. Just pour hot water over the contents, mix and let stand. Its composition is suitable for vegans and celiacs.