So we age partially as a result of these reactive oxygen species. On top of that, oxidative damage has also been linked to a variety of different types of medical conditions and medical abnormalities. For instance, things like ischemia, diabetes, cervical cancer, liver damage as a result of alcohol overconsumption, emphysema and many other disease has been linked to this process of oxidative damage. The fact that these peroxide and superoxide anions react with components of our cells such as DNA and proteins and that can actually cause detrimental effects. Now, there are many different ways by which the cells of our body can actually destroy or convert these peroxide and superoxide molecules into safer molecules. Now, the first thing that I should mention is complex four, which actually produces a peroxide bridge as an intermediate molecule doesn't simply let go of these molecules.