Popcorn is a good snack that is nutritious and low-fat. Popcorn contains more fiber than snacks made with refined flour. In addition to being low-fat, plain popcorn contains a variety of vitamins.
Air-popped popcorn is popped using hot air and is generally lower in fat and calories. Oil-popped popcorn is popped using oil or butter therefore increasing the calorie and fat content even without topping it with extra butter. A 1-cup serving of air-popped plain popcorn contains 30.5 calories. It contains 6.23 g of carbohydrates and 0.34 g of total fat. Additionally, plain popcorn contains 1.21 g of dietary fiber and 0.96 g of protein. Each serving of oil-popped popcorn contains 64 calories. It contains 4.79 g of total fat and 4.96 g of carbohydrates. In addition, oil-popped popcorn contains 0.9 g of dietary fiber and 0.8 g of protein.
Each serving of plain popcorn contains an array of vitamins including 0.008 mg of thiamin, 0.185 mg of niacin, 0.007 mg of riboflavin, 0.013 mg of vitamin B6, 0.002 mg of vitamin E and 4 mcg of folate.
Plain popcorn is a good source of magnesium and potassium. According to Fitwatch.com, one serving of plain popcorn contains 10.48 mg of magnesium and 24.08 mg of potassium. A 1-cup serving also has 1 mg of calcium, 0.26 mg of iron, 29 mg of phosphorus, 1 mg of sodium, 0.25 mg of zinc and 0.021 mg of copper.