Wild strawberries, which are much smaller, but often sweeter, can be gathered most of the summer. A one cup serving of strawberries provides 100 percent of the recommended vitamin C for an adult. Strawberries are low-calorie fruits when eaten raw. A one cup serving of berries has 45 calories. One serving of strawberries provides 100 percent of the recommended vitamin C for an adult.
Berries are also rich in potassium.
For fresh berries, use one cup as a serving size. But there's no need to worry about limiting your serving sizes if you eat fresh, raw berries. Adding sugar or high-fat products, like a pie crust or whipped topping, will add not only calories, but fat. Choose serving methods that will provide you with the best source of nutrients and limit fat and sugar. During the later part of the season, berries will be smaller and less fully developed, but still juicy.