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The Boston Globe

Metro

Workout booster contains banned stimulant, study finds

A popular sports supplement sold as a workout booster to help users “train beyond” their limits contains a banned substance derived from methamphetamine, according to tests conducted by researchers from Harvard Medical School and elsewhere and published Monday in the journal Drug Testing and Analysis.

Whether the product, a powder called Craze, poses any health risks remains unknown because it has never been tested in rigorous studies. But the finding adds to growing concerns about workout supplements after another supplement, OxyELITE Pro, was linked last week to 24 cases of liver failure in Hawaii and one death.

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