According to the United States Department of Agriculture (USDA), a serving of three Brazil nuts contains the following nutrients: 99 calories. 2.15 grams (g) of protein. 10.06 g of fat. 1.76 g of carbohydrate. 1.10 g of fiber. 109 milligrams (mg) of phosphorus. 99 mg of potassium. 56 mg of magnesium.