1. Eat slowly. Enough saliva can be well mixed with food to help the stomach digest nutrients. Let the body fully absorb nutrients and energy, and it will not be bad for the stomach.

You must consume an extra 500 kilocalories every day. When the human body consumes more calories than it does, there will be extra calories for the growth of muscle and adipose tissue.

3. Reasonable food mix and comprehensive nutrition On the premise of ensuring sufficient staple food, eat more vegetables, fruits and cereals-supplement rich vitamins, minerals and dietary fiber.

4. Eat less and eat more meals, but don't increase the amount of food per meal. Because most thin people have weak gastrointestinal function, eating too much at a meal often cannot be effectively absorbed, but it will increase the burden on the stomach and cause indigestion. You can change the number of meals per day to 4~5 times.

5. Food should be digestible, high in protein and high in calories, and gradually increase the intake of various nutrients, such as chicken, fish fillets, vegetables, sea cucumbers, butter and cream. Eat whatever you want to promote appetite. In the early stage of the "fattening" plan, you can choose some delicious food you want to eat to stimulate your appetite in a long-term fatigue state.