The pre-workout supplement, "Craze," is sold at GNC and other retailers. It was recently yanked off the virtual shelves of Walmart's online store following U.S. Anti-Doping Agency tests that found it contained amphetamine-like substances.
Craze was named 2012’s “New Supplement of the Year” by Bodybuilding.com.
A study published in the Drug Testing and Analysis found that the methamphetamine-like stimulant isn't listed on the product's label.
“Alarmingly, we have found a drug in a mainstream sports supplement that has never been studied in humans,” says Dr. Pieter Cohen, an assistant professor of medicine at Harvard Medical School. “The health risk of using supplements adulterated with a drug should not be underestimated.”
The substance, N,alpha-diethylphenylethylamine, is said to have effects that are "likely less potent than methamphetamine but greater than ephedrine." It is difficult to guess about the compound’s effects or addictive properties because it hasn’t been studied.
"It might make you feel better or have you more pumped up in your workout, but the risks you might be putting your body under of heart attack and stroke are completely unknown," Cohen said.
Researchers from Harvard began studying Craze after two athletes who used the stimulant were "banned from international competitions after failing World Anti-Doping Agency drug tests."
The company that markets Craze, Driven Sports, has posted test results on its website claiming that the product is clean. One of Driven Sports officials, Matt Cahill, is a convicted felon who has a history of selling risky dietary supplements, according to USA Today.
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