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 sweeteners.

Lactose free: Breaks down sugar molecules to ease digestion. Not reduced-calorie or low-fat.