Low-fat: 3 grams of fat per serving or less
Light: 50 percent less fat than a brand's regular ice cream
Ice milk: Can mean low-fat, light or both
Nonfat: Less than .5 gram of fat per serving
No sugar added: Neither ice cream nor add-ins can be sweetened with extra sugar; can use artificial
Lactose free: Breaks down sugar molecules to ease digestion. Not reduced-calorie or low-fat.