Technically, free electrons entering your body would give you a negative charge, which would reduce oxidation because oxygen ions are negatively charged. The same effect is used to reduce rust on ship hulls.

Unfortunately you need oxidation to breathe - that’s how hemoglobin works - so if you actually had enough electric charge to serve as an antioxidant you would suffocate. Also maybe the electric repulsion would be strong enough to dismember you, I haven’t done the math.