Walnuts. Due to the fats that are contained in nuts, vitamins (A, C, B1, B2, B12, K, E, PP), as well as minerals: iron and cobalt, walnuts protect the nervous system from overstrain, contribute to the restoration of damaged areas and improve blood circulation. They help to reduce cholesterol levels, cleanse blood vessels and intestines, stimulate bile secretion. Antioxidants in the nuts contribute to the restoration ofliver cells, protect them from toxins and harmful compounds.