The key for my has been figuring out how many carbohydrates are in a serving size of a particular food item. I'm bombarded by labels like "Low Carb, "Sugar Free," and "No Sugar Added." These phrases can be deceiving for many reasons.
First of all, many products spouting low carb claims don't really many less carbs than the regular product. They try to subtract out the fiber and sugar alcohols to get what's called "net carbs." Even the Atkins Diet does this. But to my husband's blood sugar, carbs are carbs and it goes up no matter the fiber or sugar alcohol count.
No sugar added is truthful in saying that additional sugars were not added to the product, but many things have natural sugars that make the carb count high.
Go to Health.com to read about the 16 most confusing food labels.