Which statement best describes fats?

• A. They are the only source of energy
• B. They feel good after meals
• C. They help you feel full for several hours after eating them
• D. They have no calories

Answer: (C)

Fats help you feel full for several hours after eating because they slow down how quickly the stomach empties and they stimulate satiety signals. When fat is present in a meal, it delays the movement of food into the small intestine, which prolongs the feeling of fullness. It also prompts the release of gut hormones that reinforce that fullness, giving you a longer-lasting sense of satiety. This makes fats a strong contributor to how full you feel after a meal.

It's not true that fats are the only energy source—carbs and proteins also provide energy. And fats do contain calories (about 9 kcal per gram), so they aren’t calorie-free. The idea that fats simply “feel good after meals” isn’t a reliable scientific description of their role in fullness, whereas their effect on delaying gastric emptying and promoting satiety is well supported.