Last year it was reported that microbiologists at a medical school in Norfolk, Virginia saved a man who was terminally ill with a serious infection. No anti-bacterial medicine was affective. As a last resort, large amounts vitamin C (ascorbate) was delivered into him and the man was out of the hospital within a week.

There are other eukaryotes also which are known to produce such peptides to overcome the microbial infection

Can oxidative stress cause us that much harm? I hope you address this in your future post.