That is a healthy body, we are what we eat, all you take in is processed into the base material your body is made of. Change is easy but valueble in time. Good 10 years are needed to change your entire body. The earlier you begin the better 4 U. In itself health is only one ingredient. Positivity gets you a long way. Try to surround yourself with positive people. Which is not an easy task.
Fist steps first, oranges hold fiebers our body uses in digestion. It is not only Vitamin C your body craves.
Vitamins and fieber is part of what we need. Meat, fish korn are also quiet important. We have highly complex bodies we need a lot of good ingredients. The less touched is often the best form of food.