Because obesity apparently has many causes even in a single individual the best approach seems to be

The best approach in order to prevent the growth or to obtain the factors that could cause this is through prevention. It is the best approach in which individuals should practice. It is because of the factors that contributes to this situation, it is only best to practice of preventing an individual to give in such as junk foods that could cause obesity. If they prevent themselves from having them, then it wouldn't lead to this case.