Walnut originated in the Mediterranean region and Central Asia and have been part of the human diet for thousands of years.
Walnuts are most often eaten on their own as a snack.
Like other nuts, most of the calories in walnuts come from fat. This makes them an energy-dense, high-calorie food.
Walnuts are primarily made up of protein and polyunsaturated fat. They contain a relatively high percentage of omega-3 fat, which has been linked to various health benefits.