Thin people have high metabolism. Even if you eat a lot every day, it's still not enough calories for your body, because your appetite is limited, but the calories you metabolize every day are high, natural diet is slow to digest, absorption is limited, and your abdomen is swollen. It will make your calorie intake insufficient.
Muscle-building powder can provide high calories and nutrition, and it is easy to absorb. It won't make your stomach swell, and you can drink calories and nutrition. Only in this way can we gain muscle and weight. In order to gain muscle, you need to add 300 kilocalories a day on the basis of the original diet for two weeks, so you can gain about one kilogram after two weeks, which means you can gain one kilogram in one week. If you want to continue to gain weight, one day your appetite will not keep up with the demand for calories.