(2) Endocrine problems: such as hyperthyroidism and diabetes. It will also lead to the inability to absorb nutrients.

(3) Gastrointestinal problems: flatulence, gastrointestinal malabsorption, lactose intolerance, etc. Because you can't absorb some nutrients, it will lead to bloating and constipation, and you won't get fat. Besides, if you prefer to eat raw food, you may lose weight quickly because of parasites in your body.

(4) Emotional influence: People who are easily nervous, anxious and uneasy are not easy to gain weight.

(5) Stress factors: Life stress (such as work stress and economic stress) has an impact on both psychology and physiology.

(6) Poor work and rest: including insomnia, long working hours and less exercise.

(7) Cytopathy: For example, cancer can lead to a straight-line weight loss.

[Problem solving process]

Three-pronged approach-cultivate a good figure

As long as it is not a disease factor, self-help is still effective. Doctors suggest that thin people can start from three aspects: diet, work and rest and exercise:

First, diet-pay attention to eating and gain meat.

Doctors say that thin people can help absorb nutrition as long as they adjust their eating habits. Matters needing attention are:

Break the dietary habit of high fiber and low calorie and change to a moderate fiber and high calorie diet. For example, it is also a green vegetable, but sweet potato leaves and asparagus have higher calories and can be eaten more.

Just eat the right amount of meat. Meat is rich in protein, but it takes more energy to digest protein, so eating more meat does not necessarily lead to more meat.

Eat more foods with high glycemic index such as starch and sugar. Foods with high glycemic index are easy to be absorbed and hoarded (because it will stimulate insulin secretion and make energy easy to be hoarded), and at the same time it will stimulate appetite.

Chocolate and fatty foods tend to feel full, but they will hinder the intake of the next meal. Eating more is not recommended.

If flatulence and satiety persist for too long due to gastrointestinal malabsorption or peristalsis, please consider using drugs; If it is because of the lack of enzymes in the gastrointestinal tract, you can eat more pineapples and papaya, use natural enzymes to help digestion, or use enzymes to marinate food for half an hour and decompose it slightly before cooking.

Second, combine work and rest-effectively strengthen absorption.

Adjusting work and rest has a great influence on absorption. If thin people can take a nap after meals, they can stimulate the secretion of insulin and sugar invertase and help store fat. You'd better drink something at the same time when you eat. Water can help nutrients to be absorbed by cells and stimulate appetite. Fruit juice is the best choice, or you can have soup or other drinks at the same time.

The last thing to develop is exercise habits. Don't think it's easy to gain weight if you don't move. Proper exercise can help heat enter cells and become healthier. Moreover, when sugar is absorbed by muscle tissue, blood sugar in the body will decrease and appetite will increase (many people fail to lose weight because their appetite increases greatly after exercise, and intake is much more than consumption).