Welcome! How can I help with your medical...

Hello,
Thank you for your question.
our dear customer

What are the ways that increase the strength of immunity and strength of the body?

Proper nutrition by eating proteins, carbohydrates and vitamins nourishing the body
Diet is appropriate for normal body so that the ideal food diet is made to gain weight from:
90% of the value of the diet of proteins, whether plant or animal
30% of the value of the meal of complex carbohydrates such as bread, sweets, chocolate and others
10% of the value of the meal of animal or vegetable fats, butter and others
Keep away from stress and nervous
 relax and avoid anxiety and tension
Sleep enough hours daily
Stay away from smoking and alcohol
Shower with cold and hot water
Out for outdoor air
Eat vitamins such as vitamin C, deoxyribonucleic acid, calcium and magnesium
Care for personal hygiene
Eat five servings of fruits and vegetables a day for containing beneficial nutrients to the body as well as antioxidants
Avoid eating prepared foods and soft drinks
Eat low-fat dairy products to supply the body with calcium and phosphorus
Eat lean meat, fish and poultry
Diet a few salts
Eat plenty of water daily to keep the body moist

What are the reasons for not gaining weight?

Tension and anxiety
Psychological disorders
Hyperthyroidism
Parasitic infections
Malnutrition
Indigestion
Bowel disorders
I hope my answer was helpful, please let me know if you have any follow up questions. If you feel I've answered your question already, please rate my answer from top of the page. Your feedback helps to ensure only the best experts are available to help you.
You can also ask questions of our other specialists in the areas of nutrition, therapists, IT specialists, medical doctors, and many more.
Feel free to message me anytime if you have any other questions.
Warm Regard
khaled jaber