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I know that it's best if your blood oxygen level is 92% or higher. Below that they tend to get worried and if your in the 80's they may put you on oxygen. But at what point is it actually dangerous? How low must it be to cause serious damage? I average about 94% but now that i'm living at high...

Hey everybody. I'm David. I go to College in a small mountain town in Colorado. The altitude of my school is just shy of 11,000 feet and I ski multiple days in an average week. My Doctors told me before I moved up here that I wouldn't be able to live here. I was told that I would have serious...