Yes, it is true if you are in growth phase then you should have balance diet which contain protein , fat, carbohydrates, vitamins and minerals plus physical activity according to your requirements at this age It is not good to be overweight or obese  at this age. Physical activity not only helpful in maintain ing the weight but also it will increase your stamina, strength.., concentration power, and many more. So , my suggest is to consult anycontact near by dietician or if not possible contact me through the link below

You need to take high fiber low fat diet followed by detox diet. Drink lot of water everyday. Take small and frequent meals at regular intervals of 2-3 hrs. Avoid outside food completely. Ask me directly for customized diet plan for you.

Hello Pranav, It's worth appreciating that at this young age you have become conscious about your health n fitness. Regarding weight loss remember that rather than focusing on reducing the quantity of food , you should try to enhance the quality of your diet, by having good quality proteins, complex carbs, healthy fats n lots of fruits n veggies.Follow a regular eating pattern with 2-3 hrs interval, have 4 lts of water,keep active by way of pursuing any sports of your choice and get proper sleep.

Hello dear at this adolescent tender age don't give pressure to yourself, Eat healthy high protein, high fibre ,low fat low carb balance diet devided into 3 main and 3 small meals. Regularly take milk and fruits and drynuts or roasted grains to satisfy hunger don't indulge in junk foods. Keep proper hydration Do regular physical activity of your choice to increase your capacity to study as well as do extra curricular activities.