KSDK - A day after a USA TODAY report detailing the presence of a chemical similar to methamphetamine in a popular sports supplement, the product is still on the market -- but it's becoming more expensive.
Researchers say test results on samples of Craze, a pre-workout powder made by New York-based Driven Sports and marketed as containing only natural ingredients, raises significant health and regulatory concerns.
Craze can be found on Amazon for $239.99 per can. In wake of the investigation, Walmart.com and other online retailers stopped selling the product. In recent weeks, Driven Sports' website, which offered Craze for sale, has said the product is out of stock.
"These are basically brand-new drugs that are being designed in clandestine laboratories where there's absolutely no guarantee of quality control," said Pieter Cohen, an assistant professor at Harvard Medical School and a co-author of the analysis of Craze samples being published today in the peer-reviewed scientific journal Drug Testing and Analysis.
"It has never been studied in the human body," Cohen warned. "Yes, 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."
Driven Sports has issued repeated statements in recent months that Craze does not contain any amphetamine-like compounds, including posting test results on its website that it says prove the product is clean. In July, a USA TODAY investigation revealed that a top Driven Sports official - Matt Cahill - is a convicted felon who has a history of selling risky dietary supplements, including products with ingredients linked to severe liver injury and at least one death. Cahill is currently facing federal charges in California involving his introduction of another supplement, Rebound XT, to the market in 2008 that contained an estrogen-reducing drug, and this spring a grand jury was also investigating, USA TODAY has reported.