Synthetic testosterone was applied to men with significant medical condition who have low levels of testosterone. Moreover, it is also used by millions to enhance sexual desire, energy and mood. Also treat weak erections and osteoporosis for it help increase bone density.
However, adding synthetic testosterone to the body system produced a tendency that the body will stop being able to make natural testosterone and these can be felt when men stop testosterone therapy.
The obesity problem can be decreased by reducing the amount of fat foods the individuals consume; however it all still relates back to the motivation of the person.
People can have food addictions to my knowledge, just as they may become addicted to cigarettes or drugs. They may enjoy the taste of the sugar or carbonation they intake.
Schools may offer a nutritious meal, but that doesn't mean it is good quality. I would change it by increasing the quality, even if I paid extra. I see many kids who throw away their lunch because they think it's inedible.
If you don't rest between exercise sessions you may damage you body because your muscles will have no to to rest and repair.