The main ingredient in cranberry juice is, unsurprisingly, cranberries. These tart, red berries are known for their health benefits, including their high antioxidant content and potential to prevent urinary tract infections. To produce cranberry juice, fresh cranberries are harvested, washed, and pressed to extract their juice, often mixed with other ingredients to balance flavor and sweetness. The juice is popular not only for its taste but also for its nutritional value, making it a choice beverage for many health-conscious individuals.