Baloney. Show me the reference. Vit C is used therapeutically to prevent some toxins from doing oxidative damage to RBCs.
Here is a recent one that found none: http://www.bmj.com/content/346/bmj.f10.
When searching the lay press for antioxidants you will be flooded with unfounded claims from the nutraceutical industry.
There are now several large controlled studies where none of the nutraceuticals were found to have a discernable affect. The FDA is now reviewing claims for dietary antioxidants and I would guess that within 2 years those claims will need clinical data to support those. You can believe what you want but those of use who favor actual data have a different perspective.