Strawberries contain more Vitamin C per volume than oranges do!
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Strawberries are even higher in vitamin C than oranges, with eight medium strawberries containing 160 percent of your recommended daily value (60 mg)! A medium orange contains 74 milligrams of Vitamin C, while eight average-sized strawberries provide about 96 mg. Another added benefit is that strawberries are also low in calories - just 50 per eight-strawberry serving.
(source)