One cup of warm, gooey oatmeal contains 4 grams of fiber and 6 grams of protein, a combination that slows the digestion of carbs, reduces your insulin response, and keeps you fuller for longer, says Batayneh. In fact, a study published in the European Journal of Clinical Nutrition evaluated 38 common foods and found that oatmeal was the third most filling. When possible, opt for steel-cut oatmeal, which goes through less processing than other varieties and as a result has a lower Glycemic Index score, a measurement of how much a food increases your blood sugar.
As a side or mixed in with your favorite meats, the high water and fiber content in carrots fills you up fast. Roast them for a better calorie burn: University of Arkansas researchers found that carrots roasted at 104 degrees contain three times as many antioxidants as raw carrots.