Strawberries are bright red, juicy and sweet. Strawberries are an excellent source of vitamin C. Vitamin C also plays an important role in strengthening the cornea and retina of the eye. Vitamin C is an antioxidant that can help prevent cancer because a healthy immune system is the body's best defense. Heart disease is one of the leading causes of death for Canadian women. Fortunately, strawberry benefits include powerful heart health boosters.