[jimy286]

Its not the best idea but aslong as you took a breath of pure o2 at the surface ud be ok.

Its if you continued to breath oxygen at a depth partial pressure would course it to become toxic coursing hypoxia.

Diffrent people can with stand it better then others but its not the best thing to test.

Shurly this suplament would course your body to burn the oygen quiker and more effective. I think it is use by sprinters?