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Flavonoid Quercetin Fails To Convince Scientists Of Its Performance Enhancement Abilities

October 7, 2009: 05:47 AM EST
Once heralded as a potential miraculous – and legal – performance enhancer among athletes, thanks to early studies in mice, quercetin has proven to be a dud. Follow-on U.S. studies in humans found that the flavonoid, an antioxidant found in apple skins, berries, and red wine, does not enhance athletic performance any better than a placebo. The human studies failed to replicate animal study results where quercetin mice ran 37 percent longer than before and developed new energy-producing mitochondria in cells. “My conclusion is that [quercetin] just is not ergogenic in humans,” said one U.S. researcher. “It doesn’t improve performance.”
GRETCHEN REYNOLDS, "Phys Ed: Is Quercetin Really a Wonder Sports Supplement?", The New York Times, October 07, 2009, © The New York Times Company
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