One cup of sliced, fresh strawberries, or 166 Gram, contains a range of important nutrients in the following amounts: Calories: 55 kcal Protein: 1.15 g Carbohydrates: 12.75 g Dietary fiber: 3.30 g Calcium: 27 mg Iron: 0.69 mg Magnesium: 22 mg Phosphorus: 41 mg Potassium: 255 mg Vitamin C: 97.70 mg Folate: 40 micrograms (mcg) Vitamin A: 28 international units (IU) Strawberries also contain a range of powerful antioxidants, including anthocyanins, ellagic acid, quercetin, and kaempferol.