Don't assume that a "lite" product is necessarily low in calories. According to the Food and Drug Administration, a product can claim it is "lite" for a number of reasons -- so long as these reasons are specified on the packaging. So, a "lite" product containing less oil does not necessarily have fewer calories.

Not all serving sizes are the same. Be especially aware of serving sizes on snack foods. What you may think is a single-serving bag could be two or more servings.

Be cautious of cholesterol claims. A product can be labeled "cholesterol-free" and still contain a high amount of saturated fats.