Low oxygen also occurs with sleep apnea, and with vascular problems which cut off oxygenated blood the the extremities.
Poor blood flow in the periphery also allows toxins to accumulate there. So the oxygen issue is not the only one.
When you rebreathe carbon dioxide you change the pH of the blood.
This article goes into this complex situation and you can see that it remains controversial still.
http://www.panicattacksymptoms.org.u...breathing.html
Some people at the RSD forum do hyperbaric oxygen treatments. You should look over there and "search" the term "hyperbaric oxygen" and see what you can learn about it.
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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