A Grade, High Quality, Shape - Round, Long Uniform Color Moisture - 13 to 16 %. Raisins can contain up to 72% sugars by weight, most of which is fructose and glucose. They also contain about 3% protein and 3.7%â??6.8% dietary fiber. Raisins, like prunes and apricots, are also high in certain antioxidants, but have a lower vitamin C content than fresh grapes. Dietary fiber: 3.7 g Iron: 14% 1.88 mg Minerals: Quantity Potassium: 16% 749 mg