According to Dr. William Davis, a Wisconsin-based “preventative cardiologist”, one food to avoid for the flattest abdomen is wheat. In fact, he attributes the obesity epidemic almost entirely to modern wheat products (they increase blood sugar more than any other food among other things). It’s a tough ask for some, but findings point to promising results. His book, “Wheat Belly,” details his work and how to go about eliminating the starchy culprit from your diet.
"Only doing abdominal-focused workouts, like crunches, won’t help you banish the bulge. Belly fat is simply where your body stores energy, so you need to take a whole-body approach to tackle it. HIIT training (high intensity interval training) is a great way to burn fat and get your heart rate up. Squats, burpees and treadmill sprints are all examples to try."