[zeestephen]

Re: "When oxygen levels drop, the body responds by increasing blood flow to the brain and enhancing its ability to extract oxygen more efficiently."

Recalling 8th Grade Biology...

At any given time, 50% of the blood in your body is located in your head and neck.

[cpdiii]

The research team enrolled 24 healthy young adults in the study. Participants wore a face mask that lowered their oxygen intake to 11% for five minutes, roughly what you'd experience at high altitude, before returning it to the normal 21% found at sea level.

24 adults in the study is a start and as such totally unworthy of publishing. At the O2 levels in the study equivalent to altitude one would be a little gaga and some as myself due to age and reduced pulmonary function due to age unconscious.

My above screed is not to condemn the study. My purpose is to condemn the "Peer Review Process" that would not condemn such a crap study.

Peer Review is by associates with a common agenda and thus corrupt.

I am old and by definition of education a scientists. When young I believed science and discovery and still do. When politics and socialistics entered science via government research grants I stopped believing once great journals of science such as Nature and in particular Scientific America.

Science is never settled unless it is dogma and thus not science.