Cranberries contain a good source of vitamin C Vitamin C: 24% RDA First of all, cranberries have a slightly sour taste. As a result of this, many cranberry products are loaded with sugar as well as vegetable oi. So, if you want to buy dried cranberries then be careful to check the label. Cranberryjuice is often recommended as a treatment for urinary tract infections (UTIs), based on a wealth of studies suggesting they have a beneficial effect. However, many of these studies are industry-sponsored and most recent research fails to find evidence for these claims.