Part III: Antioxidant vitamins
Calories are energy.
There are various forms of energy that can be used by the body; the three major ones are sugar, fat, and protein. These all must be converted in the cell into another form, mostly ATP (adenosine tri-phosphate) in order to provide energy for the cell to function.
Other conversions happen, including sugar into other carbohydrates or fat, and fat into sugar.
Every time an energy conversion happens some oxygen free-radicals are produced. These …