Strawberries' fiber content makes them a good choice for weight loss. A two-year study published in the Journal of Nutrition found that people who ate 8 extra grams of fiber for every 1,000 calories per day lost about 4 1/2 pounds. (Women who decreased their fiber intake actually gained weight.) One cup of strawberries has a respectable 3 grams of fiber and more than a full day's recommended dose of vitamin C—an antioxidant that helps keep skin healthy.