Hello, if you can tell me what you usually eat, and you won't be hungry if you supplement your energy and protein intake, it's probably related to what you eat. If you eat something without energy, you won't be full. As for whether to eat fat or not, it may be that your intestinal villi are too short to digest what you eat. For example, if you eat 1 kg, others can digest 0.5 kg, and you can only digest 0.2 kg. If you want to gain weight, you will naturally not gain weight. If you eat sheep liver once or twice a week, it will improve the villi of your small intestine and improve your digestive efficiency. Besides, you didn't say your age, which is also very important. The energy intake required by workers of different ages and types is different for men and women.