Researchers say it has to do with the flavonoids, the heart-healthy compounds in chocolate, that have important antioxidant and anti-inflammatory properties. Just be sure you’re reaching for a bar with at least 70 percent cacao, and stay away from the “alkalized” stuff, which has a significantly reduced flavonoid content. We like Nibmor Extreme Dark Chocolate with Cacao Nibs.
The book itself doesn't get tediously microbiome-focused, though. The first section of The Lose Your Belly Diet sets the stage, then part two goes into which foods can give you that healthy mix of gut bacteria. Part three focuses on other ways to boost your stomach's microbiome health (avoiding antibiotics when you don't need them, exercise, and what probiotic supplements to take, namely), while part four gets actionable, providing a diet quiz, recipes, and a meal plan.
Hold a resistance band taut between your hands and lie on the floor face up, with legs extended and arms overhead. Pull abs in, tuck your chin, lift arms toward the ceiling, and roll head, shoulders, and torso up and over your legs as far as you can. Keep heels firmly on the floor and reach your hands towards your feet. Pause, then slowly roll back down. Do 5 to 8 reps with 30 minutes of cardio 5 to 6 times a week.
Know your anatomy. Familiarize yourself with the muscle groups that make up your abdominal area. If you understand how the muscles work, it will be easier to use them properly when you exercise. Then plan a smart abdominal workout to complete at least three times per week. It doesn't have to last longer than 10-15 minutes, but it should include exercises to work the internal and external obliques on the sides of your torso as well as exercises to work the rectus abdominis, which runs down the middle of your midsection and defines your six-pack.

Peterson is a fan of Chaturanga Dandasana—a.k.a. yoga pushup—for the extension and isometric contraction it provides: From plank, bend your elbows and begin lowering toward the floor, with every part of your body an equal distance from the floor. Keep your elbows close to your body, abs engaged (not clenched), back straight, thigh muscles active, and glutes soft. Start by holding the pose above the floor for 5 full, complete breaths, and work up to 10. Push back up to plank in 4 counts. Do 4 reps every other day.
A healthy lunch should consist of half non-starchy vegetables, with the other half split between whole grains and protein, says Rumsey. “That way, you have some carbs but not too much,” she says. Pick a dressing low in sugar and sodium—olive oil with balsamic vinegar will give you a little healthy fat to keep you full and help absorb nutrients from your veggies. (Here are more food combinations that help you get the most health benefits.) Add at least three vegetables, 3 to 6 ounces of a protein like chicken or beans, and just a thumb-sized amount of extras for crunch or flavor such as dried fruit, croutons, and olives, says Rumsey. Double wash canned beans before adding them to your salad to rinse away their gas-forming, bloat-producing properties, says Crandall.
"Researchers are now discovering that gut bacteria also seem to play a role in the complex process of weight loss and weight gain," he writes. "We don't know exactly how much impact our Little Buddies have on our weight, but we're learning enough to believe that understanding the connection more fully may help us as we confront the obesity epidemic in the United States — and in our own bodies."
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