Walnuts are nicknamed as “brain food” as they have very high content of Omega 3 Fatty acids. Also, surprisingly these nuts approximate to the structure of a human brain. Walnuts are significantly higher in omega-3 fat, an essential fat. Walnuts are brimming with antioxidants. They are rich in Potassium, Carbohydrate, Dietary fiber, Calcium, Iron, Vitamin B-6, Vitamin C and Magnesium.