Know it: Sugar is fine in moderation, but many processed foods contain much more—and in different places&mash;than you'd expect. Since ingredients are required to be listed from most to least on food labels, manufacturers often break up the sugar into smaller amounts of lesser-known sugars, making the food appear healthier. Another issue is that real sugar is often replaced with artificial sweeteners, which can cause bloating and stomach discomfort.
Avoid it: Nutritionally speaking, there's not a huge difference between different types of sneaky sugars so knowing the pseudonyms is half the battle. While there are more than 50 names for the sweet stuff, common tricky ones include brown rice syrup, barley malt, caramel, fructose, fruit juice concentrate, and anything involving corn syrup.