<.<; I would just like to point out the reason we die of age is because as DNA replicates itself it slowly mutates/loses pieces in the chain. As more pieces are lost your body begins to show the change, i.e. your skin sags, your hair goes grey, organs don't function as well, etc etc. Eventually your DNA doesn't produce effective enough cells to sustain life and then you die.
Actually, oxidative damage is thought to contribute to aging along with telomere shortening and glycation (binding of glucose to the body's molecules). In short, everything is killing you ^^