We can’t live without oxygen.
Our cells rely on oxygen as the final acceptor of electrons in respiration, allowing us to extract far more energy from food than would be possible without oxygen. But oxygen is also a dangerous compound.
It has been long known in the medical field that proper healing of the body and resistance to infection cannot occur without oxygen.
Oxygen is believed to be required for all the major processes involved in wound healing, including resistance to infection, activation of fibroblasts, collagen deposition, angiogenesis, and epithelization.
The basic science of oxidative stress and the antioxidant response is not in contention, what is an effective antioxidant is.
When the body breaks food down into energy, it generates a by-product known as free radicals. Also present in food itself, the air we breathe and the sun we worship, free radicals are a broad class of chemicals with the potential to exert significant damage.