Ginseng unproven in U.S.

LAST year, Health Canada, the Canadian equivalent of the Food and Drug Administration, granted COLD-fX license to make a specific scientific claim -- something the patented American ginseng extract can't do in the U.S. The claim: Two 200-milligram doses of COLD-fX per day "helps reduce the frequency, severity and duration of cold and flu symptoms by boosting the immune system."

February 18, 2008