One cup of chopped peanuts, oil-roasted with salt, contains 76 grams of fat, 13 grams of saturated fat, 461 milligrams of sodium, 22 grams of carbohydrates and 40 grams of protein. This amount also contains 862 calories.
One cup of chopped peanuts, oil-roasted with salt, also contains essential vitamins and minerals, including over 50 percent of daily values as determined by the Food and Drug Administration of vitamin E, niacin, magnesium, phosphorous and manganese. The serving size also contains significant percentages of daily values of vitamin B-6, folate, potassium, zinc and copper. The calories in the cup of chopped peanuts are broken up as follows: 73 percent from fats, 16 percent from proteins and 11 percent from fat.
Peanut's Amino Acid Score as rated by the Institute of Medicine's Food and Nutrition Board is 66. The Amino Acid Score rates the quality of the proteins in a food by evaluating the content of nine essential amino acids. If one or more of the amino acids in a food is insufficient, the protein content is considered incomplete. An Amino Acid Score of 100 or higher suggests a the food contains high-quality proteins. In the case of a score lower than 100, such as with peanuts, the food should be accompanied with complementary sources of protein for the best nutritional intake.
According to Nutrition-And-You.com, peanuts are also a good source of antioxidants, notably p-coumaric acid and resveratrol, which some studies indicate may help in reducing cancer risk, heart disease and damage to the nervous system. The MAYO clinic recommends eating peanuts for their unsaturated fats, fiber, vitamin E and plant steroles, all of which contribute to lower cholesterol and general heart health. The Peanut Institute reports that peanuts contain one of the highest natural sources of arginine, which studies have shown to reduce blood pressure.
The United States Department of Agriculture maintains a database of specific nutritional information for raw peanuts, both generally and for specific breeds of peanuts on its National Nutritional Database, available on its website. The Peanut Institute offers additional nutritional information as well as details for other peanut products, such as roasted peanuts, peanut butter and peanut oil.