Can oxygen become too low? There is no exact scientific evidence to determine exactly what percentage of atmospheric or internal body oxygen is too low. Each body reacts differently and some can adapt to the lower oxygen easier than others.
It is suggested that anyone who is exposed to below 80% blood oxygen for a prolonged period is at risk of organ failure however recent research also indicates that some humans can still adapt and survive at below this level. It is for this reason any clients who descend with symptoms above moderate are recommended to visit the hospital before returning to their post climb lodges or carrying on with their next tour.
Regular monitoring with high-altitude pulse oximeters, understanding the implications of blood oxygen levels, and taking necessary precautions are crucial. Your blood oxygen levels will be monitored regularly on the trek for your safety.