Turkey and tomato on wheat. Whole-grain pasta. Healthy, right? Maybe. But more and more people believe these foods are parts of a potentially disastrous trap. They claim that sluggishness and weight gain can be blamed on an insidious substance hiding in wheat and many other common grains: gluten.
Avoiding gluten has become big business. Sales of gluten-free products grew about 30 percent a year from 2006 to 2010, and will hit $3.9 billion by next year, according to the market research company Packaged Facts. Supermarket shelves are filled with gluten-free breads, soups, and cake mixes—even gluten-free ketchup and soy sauce. According to market research firm Mintel, 10 percent of new foods launched in 2010 featured a "gluten-free" claim, up from only 2 percent 5 years earlier.
NFL quarterback Drew Brees won a Super Bowl while on a gluten-free diet. Cyclist Tom Danielson, a record-breaking member of the Garmin-Transitions team, says his training and racing have improved since he and his teammates went gluten-free over a year ago.
Have most common whole grains been acting as insidious nutritional double agents all these years? Or are they essential components of a healthy diet? Let's separate the wheat from the chaff.


What is gluten, anyway? How does it affect the body?
Gluten is a protein found in wheat, barley, and rye, as well as in many common food additives. It's what gives dough its elasticity and baked goods their satisfying chewiness. But for people with celiac disease—a type of autoimmune disorder—eating foods that contain gluten can lead to a cascade of nasty reactions, including damage to the small intestine, poor nutrient absorption, diarrhea, abdominal pain, bloating, anemia, and fatigue. Celiac disease is surprisingly common, affecting about one in every 133 people, according to an often-cited 2003 study from the University of Maryland center for celiac research. There is no cure for celiac disease and no drugs that can treat it; you can only manage the condition, by sticking to a gluten-free diet for the rest of your life.
Even if you don't have celiac disease, gluten may still be bad for you, says Lara Field, M.S., R.D., a dietitian at the University of Chicago's celiac disease center. A rising percentage of people in the United States consider themselves "gluten-sensitive." "These people may have a food intolerance or experience many celiac-type symptoms after consuming foods that contain gluten," says Field. Some may have a form of wheat allergy. If you think you may have symptoms of a gluten intolerance, ask your doctor about scheduling a blood test to find out for sure.
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I need to drop pounds. Is a gluten-free diet worth a shot?
A gluten-free diet can work, but dealing with the diet's restrictions can be daunting. "You have to commit to a true lifestyle change, and that can be tough," says Edward Abramson, Ph.D., a professor emeritus at California State University at Chico and the author of Emotional Eating. "Men might be able to follow gluten-free for a short time," he says, "but without a real medical need, they might have a rough time sticking to it."
But the notion of a panacea for excess weight remains seductive, and that may be part of the appeal of the gluten-free movement, says Michael R. Lowe, Ph.D., a professor of psychology at Drexel University who specializes in nutritional approaches to weight loss. It sounds simple: If I do this one thing, then I will see the results I'm after. "That's the driving appeal of elimination diets," Lowe says.
Ironically, the boom in gluten-free products isn't necessarily helpful to those looking to lose weight. "You can buy gluten-free versions of practically every type of wheat-based food— pizza, pasta, cookies, you name it," Thompson says. But here's the catch: Healthy-sounding gluten-free items often contain just as many calories as the originals. People might overindulge in gluten-free options because they seem like "safe" foods, says Field. "People see 'gluten- free' and think they can down an entire box of gluten-free cookies with no repercussions."
So even if you stick to a gluten-free diet, it can actually lead to weight gain. A 2006 study in the American Journal of Gastroenterology followed 188 people with celiac disease (half of whom were overweight or obese) on a gluten-free diet for 2 years and discovered that 81 percent of them gained weight.
If you do give up gluten, use your new eating plan as a lens to reexamine your diet—and your life. Cyclist Danielson says, "I don't know if it was directly tied to the food, but I found that by having to pay more attention to my daily diet, I became more focused on my cycling."
Avoiding gluten takes constant monitoring— the same attention to detail you need to excel in your workouts. "I became more dedicated and took a more professional approach to my training when I went gluten-free," Danielson says. "I couldn't get lazy and down whole pizzas and bowls of pasta. I had to focus on putting better food in my body, and this made me realize how much my eating habits off the bike affected my performance on it." Mindful eating is key. After all, "you don't need to go gluten-free to avoid refined processed carbs," says Thompson.
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The New Power Grains
Even if you don't need to avoid gluten, it's a good idea to explore the world of gluten-free grains. All of them are rich in belly-filling fiber, and each offers unique benefits.

Quinoa
Once an energy booster for Inca warriors, this superfood of the Andes provides complete protein, with all nine essential amino acids. It's also low on the glycemic index, so it won't spike your blood sugar.

Try it: Ancient Harvest Quinoa Shells are made from just two ingredients: quinoa and corn. Toss with chicken sausage for even more protein. quinoa.net

Buckwheat
Buckwheat is rich in rutin, a flavonoid that has potent antioxidant properties. It's also rich in heart-healthy magnesium.

Try it: Arrowhead Mills Maple Buckwheat Flakes have a light, crispy texture. Buckwheat also makes a hearty substitute for rice.

Amaranth
A grain the size of a poppy seed, amaranth has more protein than wheat and twice that of white rice. Initial studies in rodents suggest that amaranth's high protein content can help lower cholesterol.