Supplemental Oxygen Is Essential for Summiting Mount Everest

At Everest's summit (8,848 m), oxygen partial pressure is ~1/3 of sea level. Without supplemental oxygen, extreme hypoxia causes rapid exhaustion, impaired judgment, unconsciousness, and death. Most climbers use bottled oxygen (mask + tanks) or continuous-flow systems carried by support teams.

Benefits

• Reduces altitude sickness risk (headache, nausea, HAPE/HACE).
• Improves endurance and decision-making.
• Increases summit success rates.

Limitations

Oxygen is not a guarantee; weather, fitness, and objective hazards remain deadly. Many have died even with oxygen.