From Drugfree.org: The sports supplement “Craze,” popular in the United States and other countries, contains a meth-like chemical, USA Today reports.
Scientists in the United States and South Korea who tested the chemical say it appears to have originated as an illicit designer recreational drug. Craze is sold as a pre-workout powder made by the company Driven Sports. The powder is marketed as containing only natural ingredients, the article notes. The scientists began testing Craze after athletes who said they had used the supplement failed several urine drug tests.