A US consumer group has called for the Food and Drug Administration to recall 10 products containing a synthetic form of ephedra following similar recalls in Canada.
The consumer group Public Citizen is concerned about recent research which links the herbal supplement to cardiac arrhythmia, stroke and even death.
The FDA has already proposed limitations on herbal ephedra products in 2000, but the consumer group claims that pressure from the dietary supplements industry has forced it to re-evaluate its position.
Public Citizen has been campaigning against ephedra products for some time, and called for an out-and-out ban of the supplement last September.
"Failure to act swiftly and decisively in this matter as required by law and to ban all ephedra alkaloids will result in a continuation of the harm and injury of dietary supplement consumers nationwide," Public Citizen said in a letter to the FDA.