According to Driscoll's, one portion, or serving, of fresh strawberries is equal to 1 cup. That's about the same as eight whole strawberries. A single serving of strawberries has about 50 calories.
Strawberries have a large amount of vitamin C. Each serving portion delivers up to 160 percent of the recommended daily value for the vitamin. A study published in the Annals of the Rheumatic Diseases suggests that people who consume a diet that includes foods high in vitamin C have a reduced chance of developing arthritis. Because strawberries are plants, they naturally have no cholesterol. One serving also has 2 grams of fiber. Strawberries are a good source of potassium, which helps maintain normal blood pressure. The nutrients found in strawberries help maintain heart health and lower the risk of certain types of cancer.