There is no real evidence that xenon stimulates the production of red blood cells. This is likely just a placebo effect kind of thing that maybe gave the climbe

There is no real evidence that xenon stimulates the production of red blood cells. This is likely just a placebo effect kind of thing that maybe gave the climbers a bit of extra confidence. https://doi.org/10.1016/j.heliyon.2023.e15837 https://doi.org/10.1016/j.heliyon.2023.e15837