Maybe you guys ought to read this new book. It might change your mind. Its called "The Oxygen Revolution" written by a doctor.
On the front of the book it says
HYPERBARIC OXYGEN THERAPY:
The Groundbreaking New Treatment for
DIABETES
AUTISM
HEART DISEASE
STROKE
ARTHRITIS
AIDS
ASTHMA
And it lists about 16 more diseases.
Oh, DOC, there is a clear difference between transient oxidative stress and persistent oxidative stress.
Transient stress induces the upregulation of antioxidant enzymes, so when you are under the normoxic environment you are better protected. This is actually one of the ways exercise is good for your heart/vasculature. Increased blood flow results in a shear induced oxidative stress response, again providing prophylactic protection against daily oxidative injury. This same mechanism is exploited in some heart surgeries via a process known as ischemic preconditioning. Of course, in that setting, blood flow is temporarily stopped in order to induce the oxidative stress.
Now, under persistent oxidative stress environments, your body will upregulate its antioxidant defenses and will serve to defend against the increased onslaught of radicals.(mostly in lungs in hyperoxic environments). However, this upregulation and constant stress is a more difficult setting to maintain. Also, if our antioxidant defenses are already occupied with simply defending against the oxidative environment, we lose the extra capcity to defend against transient stress systems. E.g., times of exercise may become damaging. tissue damage from White blood cells fighting off infections may become more severe(WBC release large amounts of oxygen radicals, super oxide, in an effort to kill of invading bacteria).
Also, note that hyperbaric oxygen (high pressure oxygenm which can be hyperoxic(>21% or not), is even more damaging under long term use. Oxygen carriage in the blood is restricted to the hemoglobin content. Oxygen solubility in the plasma at normal pressure and atmosphere is rather low. However, under increased pressure, solubilty goes up. This means a lot more oxygen gets to the brain, which isn't a good thing. This typically leads to seizures via unknown mechanisms.
J Heart Lung Transplant. 2006 Nov;25(11):1302-9
abstract said:
Normobaric supplemental oxygen can prolong seizures not caused by hyperbaric oxygen therapy. In addition, hyperbaric oxygen therapy can cause seizures. The mechanism of hyperbaric oxygen-induced seizures is unknown. We hypothesized that pretreatment with pyridoxine may delay the onset of hyperbaric oxygen-induced seizures, recognizing that pyridoxine is already an antidote for some epileptogenic poisons such as isoniazid and monomethylhydrazine. Therefore, rats were pretreated with intraperitoneal injections of pyridoxine at 48, 24, and 2 h before undergoing hyperbaric oxygen (HBO) treatment at 3 atmospheres absolute with 100% oxygen and were compared to a control group of HBO-treated rats for time to onset of seizures. There was no difference in onset of seizure time between the pyridoxine-treated group of rats and the control rats. Supplemental pyridoxine pretreatment did not alter the time to onset of seizures during HBO treatment in this study.
DOC, I am quite serious when I say that you are plain and simply wrong on this subject. Your attempt at finding evidence to avoid admiting this was a waste of time. You could have saved yourself much effort and gained some respect had you simply admitted that you made a mistake and made a claim that was patently wrong.