oxidative phosphorylation

But this entire field of study is new, and oxidative stress is not clearly linked to aging or cell damage (see here).

That creates a large oxidative stress,” he says, “so we would expect an antioxidant [like vitamin E] to be helpful.

Leonardo Nogueira et al., "Epicatechin Enhances Fatigue Resistance and Oxidative Capacity in Mouse Muscle."

Enzymes which govern oxidative changes, known respectively, as catalases and oxidases, are almost universally present in plants.