There are two main factors I urge readers to be aware of when buying fruit juice: the percentage of actual fruit juice and the presence of added sugars. The main thing to be aware of is ‘juice cocktails’, which are mixtures of various fruit juices, added sugars and water. In particular, be wary of cranberry and grape juice mixtures. Some of these contain up to 50 percent more sugar than soda per ounce. Of course, added water isn’t a bad thing, but it’s simply more economical to buy a 100 percent juice and dilute it with water yourself. You’ll get the same amount of vitamins and antioxidants and less than half the sugar.