Potatoes can be a fulfilling food that will help you lose weight. “Eat sweet potatoes, they keep your blood sugar stable,” Amsterdam says. Potatoes are actually a great source of vitamins, potassium, which is important for controlling blood pressure, and other healthy nutrients that keep you full for longer. A study in which people reported the most satiating foods, boiled potatoes ranked highest, even before brown rice. The skin is high on fiber which makes is filling and nutritious as well.