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Published on: 5/15/2000
Last Visited: 6/4/2008
These inconsistencies highlight the trouble consumers have in choosing supplements, says Bill J. Gurley, associate professor of pharmaceutical sciences at UAMS and lead author of the study.
"There are some companies out there that are right on the money," he says."Unfortunately, there are many others that aren't."
But even knowing a product's overall ephedra alkaloid content may not be enough, Gurley says."What makes up that amount can vary dramatically."
The alkaloids ephedrine and pseudoephedrine are most common in ephedra-containing dietary supplements, and came up most frequently in the ones tested, Gurley says.
...
"If you're going to take them, it's probably best not to take them and go run a mile or two," says Gurley.Because their effects upon heart rate and blood pressure can vary, he thinks you should avoid strenuous exercise for at least an hour or two after taking ephedra supplements.
If you're worried, read these HealthSCOUT stories about the FDA's investigation and the death of a bodybuilder after taking the supplement.
The American Academy of Family Physicians offers a detailed information sheet on ephedra.
SOURCES: Interviews with Bill J. Gurley, Ph.D., associate professor of pharmaceutical sciences, University of Arkansas for Medical Sciences; and John Cardellina, vice president of botanical sciences, Council for Responsible Nutrition; May 15, 2000 American Journal of Health-System Pharmacy