Try getting enough sleep with good nutrition and exercise.

    

What is the age of your brother?

Protein is a primary component of our muscles, hair, nails, skin, eyes, and internal organs, especially the heart and brain. Protein is needed for growth, for healthy red blood cells, and much more. Protein foods include eggs, cheese, soy products (soymilk, tofu, miso, tempeh), fish, beans, nuts, seeds, chicken, turkey, beef, and pork. If you are interested in following more of a vegetarian diet, choose soy products, beans, and nuts to satisfy your protein needs.

Carbohydrates are our main source of energy and play an important role in the functioning of our nervous system, muscles, and internal organs. Carbohydrate foods include fruits, vegetables, whole grains, and beans. The foods you should eat in limited amounts are ones that contain sugar, such as packaged cookies, cakes, soda-these sugars are called simple carbohydrates; they have a negative effect on your blood sugar levels and your moods as well.

Fats are a form of energy reserve and insulation in your body, and can be burned to make energy when you don't get enough from your diet. Fats transport nutrients such as vitamins A, D, E, and K through your body and fatty tissue protects your vital organs from trauma and temperature change.

It is good to get some tips about your health, this will increase your knowledge and you can differentiate what you should need to do.

I think balance diet and everyday take vitamins and minerals naturaly.

Anybody know about what is balance diet?

What your brother need is a proper diet.You can consult any general physician for better tips.

I think your brother should first stop measuring his health by unconventional ways.

He should avoid "trying to be fat", you know, eliminating his skinny-ness.
If you could check out how being overweight or over fat is, you will realize that measures such as body mass ratio, the relation of weight and height and age, are the best to evaluate his health position.

Anyway, feed him healthy balanced diets. I insist, let the diet be healthy. A pizza may be balanced but it is not healthy.

Let him start with exercise he is comfortable with without jumping his gun and doing adult workouts.

As teenagers go through a lot of changes, the body is constantly rebuilding itself. This therefore manifests in his health outlook.

Finally, avoid being overly self conscious. You lose, you gain, everything will be alright at the end of the day.