Walnuts (Juglans regia)
Walnuts come in two varieties, the European walnut and the black walnut which originates from America. These nuts provide a balanced all-round nutritional package, with all the main nutritional components being present in useful amounts.77 The protein content of the black walnut is higher than that of the European walnut, but both provide excellent protein value because of their balanced composition of essential amino acids. Combinations with other protein sources would, once again, improve protein availability. Add walnuts to muesli or enjoy them just as they are.