The Natural High?

A leafy herb may fight the ills of altitude

Aug 1, 2000
Outside Magazine

"PEOPLE NEED TO LEARN how to acclimatize properly," says American Alpine Club medical committee chairman Franklin Hubbell. "If not, they're ignoring what a hundred years of climbing has taught us: You can't cheat death, taxes, or altitude." But now, thanks to a $7.99 herb on the shelf at every right-thinking grocery store, you may be able to haggle a bit.

The wonder plant? Ginkgo biloba. In clinical trials held in April, climbers taking the supplement were half as likely to experience acute mountain sickness as those taking a placebo. Peter Hackett, president of the International Society of Mountain Medicine and colleagues Kirsten Maakestad, a physician at St. Mary's Hospital in Grand Junction, Colorado, and Gig Leadbetter, professor of exercise science at Mesa State College (also in Grand Junction), co-authored the study of the leafy-tree derivative commonly prescribed by homeopaths as a treatment for Alzheimer's disease. "I don't think it's a miracle drug—people still got sick—but it's particularly good for slow ascents," says Hackett.

Half of the 40 college students participating in the team's trials swallowed two 60-milligram ginkgo tablets twice a day, starting five days before ascending Colorado's 14,110-foot Pike's Peak, while the other half took placebos. After ascending 7,000 feet in two hours (no, they aren't superhuman—they drove) and spending the night, only 33 percent of those on ginkgo had symptoms of mountain sickness, while 68 percent of the control group experienced nausea, headaches, lack of appetite, or dizziness.

The findings, presented this month in Park City, Utah, at the annual Wilderness Medicine Society conference, could come as welcome relief to those who take Diamox, currently the most widely used mountain-sickness medication. The drug's side-effects, which include frequent urination and a possible allergic reaction, turn many climbers off. While fully half of those attempting Alaska's Mount McKinley develop some signs of altitude sickness (according to a 1998 study published in American Family Physician), Hackett estimates that only one-third carry Diamox and fewer still actually use it.

Ginkgo may be just the ticket, but not all mountaineers are rushing to the supermarket. Eric Simonson, the leader of last year's Mallory-Irvine Research Expedition, has had "no experience with the ginkgo stuff." But that may change soon. Hackett's research confirms similar findings from a 1996 French study, and at press time, University of Hawaii researchers were repeating his team's experiment on 13,796-foot Mauna Kea. Even if the results are promising, it may take some time before the climbing community endorses a 200-million-year-old herb. "These things rarely pan out for us mountaineers," says Todd Burleson, owner of Alpine Ascents International. "But if Pete's saying it's reality, then it definitely means a lot."



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