"Many women make drastic changes to their diet when it's bikini season," says Tamara Duker Freuman, RD, a nutritionist in New York City who specializes in digestive disorders. "If you're used to lower-fiber meals and you suddenly start eating a lot of fruit, salads, and bran cereals, you're going to be significantly bloated." That's because you don't have the right bacteria in your gut to help digest the increased amount of fiber.
We all have trillions of bacteria in our intestines, which help us process the food that our stomach and intestines have a hard time breaking down, Dr. Quigley says. "When undigested food reaches your colon, bacteria feed on it and produce gas," he explains. The type of bacteria that's in your gut is determined in part by what you eat, and some sorts produce more gas than others. Without the right kind, fibrous foods, which are typically slower to digest, linger in the gut even longer, giving bacteria plenty of time to munch away and create gas.
Not only that, but "everything from energy bars to yogurt is fortified with fiber these days," says Joy Bauer, RD, the author of The Joy Fit Club: Cookbook, Diet Plan, and Inspiration. "It's a problem, because they typically contain large amounts of inulin, a fermentable fiber that may cause gas and bloating when consumed in large quantities."
Deflate-it fix: Make your belly fiber-friendly by building up a tolerance gradually, adding five grams or fewer from fruits and veggies every week until you reach the recommended daily 25 to 35 grams. "Some people have a really hard time with beans, while others have more of a problem with broccoli and other cruciferous vegetables," Freuman says. "Start by upping your fruit and vegetable intake at just one meal so you can keep track of what causes the most problems. Over time your gut bacteria population will reach a new 'normal' baseline, and your body will adjust to the volume of gas they produce without experiencing discomfort." Scan labels for inulin, which is also called chicory root extract or chicory root fiber. "If it's the first ingredient listed, the food contains quite a bit of it," Freuman says. Avoid it.
Tummy Puffer: Popping Vitamins
Many supplements contain additives and fillers, King says. Common ones include lactose or wheat — a problem for those who are lactose- or gluten-intolerant — and sugar alcohols like mannitol or xylitol, which are notorious bloat culprits because they tend to be slower to digest than other carbs, giving intestinal bacteria plenty of time to feast on them and produce gas.
Deflate-it fix: Look for a multi with a short ingredients list that contains few difficult-to-pronounce words (they're often indicative of additives and fillers) and avoid any that list sugar alcohols, lactose, or gluten, which may also be called wheat germ, food glaze, food starch, or hydrolyzed vegetable protein — if they're listed at all. "Supplements aren't regulated by the FDA, so all their ingredients may not be noted on the label," King explains. A safer bet: Get your daily dose of vitamins and minerals by eating a variety of whole foods.
Tummy Puffer: Snacking on Protein Bars
"These bars often contain whey-protein concentrate or milk-protein concentrate, which causes bloating in people who have trouble digesting lactose," Freuman says. Others are made with soy-protein concentrate, which can be gas inducing because it's a bean product and contains indigestible, fermentable carbs in addition to protein.
Deflate-it fix: Look for bars with proteins that are typically easier to tolerate, like nut or rice proteins or whey-protein isolate (as opposed to concentrate), which contains a higher percentage of pure protein and less lactose than other forms. "You may pay a little more, but it's worth it," Freuman says.
Burst Your Bubble
Three easy ways to flatten your belly fast.
Eat a banana every day. The potassium it contains helps prevent bloat. "When potassium is low, the body retains extra sodium and holds on to water," says Joy Bauer, RD. Other potassium-rich foods include tomatoes; mushrooms; dark leafy greens, like spinach and Swiss chard; and fish like salmon and halibut.
Spoon more yogurt. Check labels to find one that contains bifidobacteria. "Some studies show that these bacteria can reduce flatulence and bloating," says Eamonn Quigley, MD. Fage Total Greek Yogurt and Activia both contain bifido. You can also pop a probiotic supplement, like Align, that contains it.
Contract your abs. "Many people aren't actually bloated at all; they've just developed a habit of relaxing their abdominal muscles and contracting their diaphragm, which makes them look and feel bloated because their stomachs are sticking out," says Brennan Spiegel, MD, an associate professor of medicine at the David Geffen School of Medicine at UCLA. Learn to contract your abs instead. Imagine someone is about to punch you in the gut, and pull your belly button in toward your spine. Practice contracting your abs for five to 10 seconds several times, being sure not to hold your breath. Once you get used to the feeling, remind yourself to do it periodically throughout the day so that it becomes a habit, and you won't look or feel as bloated.