Soluble fiber absorbs water and forms a gel that helps slow down food as it passes through your digestive system.
Studies show that this type of fiber promotes weight loss by helping you feel full, so you naturally eat less. It may also decrease the number of calories your body absorbs from food (3, 4, 5).
What's more, soluble fiber may help fight belly fat.
An observational study in over 1,100 adults found that for every 10-gram increase in soluble fiber intake, belly fat gain decreased by 3.7% over a 5-year period (6).
Make an effort to consume high-fiber foods every day. Excellent sources of soluble fiberinclude flaxseed, shirataki noodles, Brussels sprouts, avocados, legumes and blackberries.
Trans fats are created by pumping hydrogen into unsaturated fats, such as soybean oil.
They're found in some margarines and spreads and also often added to packaged foods.
These fats have been linked to inflammation, heart disease, insulin resistance and abdominal fat gain in observational and animal studies (7, 8, 9).
A 6-year study found that monkeys who ate a high-trans-fat diet gained 33% more abdominal fat than those eating a diet high in monounsaturated fat (10).
To help reduce belly fat and protect your health, read ingredient labels carefully and stay away from products that contain trans fats. These are often listed as partially hydrogenated fats.