Suggestion: protein should eat more foods rich in fat and carbohydrates (starch, sugar, etc.) when it has enough intake. In this way, excess energy can be converted into fat and stored under the skin, making the thin body strong. Thin people with weak gastrointestinal function can choose the liver of chickens, ducks, fish and sheep to eat. In addition, fish is easy to digest and absorb. If you want to gain weight, you must first gain weight scientifically and gain weight for health. Besides a balanced diet, you should also keep enough and good sleep. If people get enough sleep, their appetite is better, which is also beneficial to the digestion and absorption of food. Many thin people like to spend the night, always play all night, and have to go to work the next day, which seriously affects the quality of sleep, so it is strange not to be thin. Personal mental health should also be paid attention to. Tension and pressure at work, obsession with small things in life, and "crazy" study or work beyond human load will make people thin. On the contrary, a happy mental state and harmonious interpersonal relationship will help you gain weight.