Peanuts come from the legume family and are used in many foods and recipes. Peanuts are nutritious and versatile, despite some people's allergic reaction to them. The most commonly consumed form of peanuts are those that have been roasted in oil. One cup of chopped peanuts weighs 144 grams.
One cup of oil-roasted peanuts contains 862 calories. Approximately 90 of these calories come from carbohydrates and 140 from protein. The majority of the calories, 632, are from fat.
One cup of peanuts contains 22 grams of carbohydrates, 1/7 of the composition of peanuts. Of these carbohydrates, 14 grams are dietary fiber and 8 grams simple sugars. Peanuts contain no starch.
Fats and Oils
Peanuts contain large quantities of fats and oils, almost 76 grams. One cup of peanuts contains 12 1/2 grams of saturated fat (two-thirds the recommended daily amount). The remaining fats are unsaturated, with 21 grams being omega-6 fatty acids.
The main vitamin that peanuts provide is niacin. One cup has the full recommended amount of niacin. A cup of peanuts also provides about half the recommended amount of vitamin E and folate and one-third the recommended levels of vitamin B6.
Minerals and Other Compounds
Peanuts are rich in manganese (one cup provides more than the recommended daily allowance), magnesium and phosphorus (one cup provides almost two-thirds the recommended levels of both). One cup of peanuts also contains 2 grams of water and almost 4 grams of ash, neither of which have a recommended daily amount. Nutritonally speaking, ash is a trace mineral with little benefit.