Before picking up a bag, container or box of frozen fruit, read the label to ensure the fruit has no added sugars. Many frozen fruit products contain refined sugar. Fresh and frozen fruits and vegetables are processed and stored differently. be treated with ascorbic acid (a form of vitamin C) or added sugar to prevent spoiling. Usually, no chemicals are added to produce before freezing. No-frills generic or brand name? Fruit and vegetable superfoods that can enhance your health. By contrast, most frozen fruits and vegetables are promptly blanched, . How a sugar-rich meal can derail your healthy habits.