Recent headlines report that British climbers reached the summit of Mount Everest in record time after using xenon gas as part of their pre-acclimatization strategy. But what is xenon, and does it truly enhance performance at altitude? We dive into the science behind this noble gas, its effects on the body, and whether it could be a game-changer—or just hype—for mountaineers pushing the limits in thin air. Doping with xenon is likely not the answer.