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Many Web sites are marketing products known, or suspected, to contain aristolochic acid--a potent chemical that has been banned for years in Canada and the UK and can cause cancer and kidney failure.
A recent study published in the October 16, 2003 edition of the New England Journal of Medicine showed that about 100 Web sites are selling 115 products believed to contain the toxic herb. The "natural" products range from cough syrups to remedies for premenstrual syndrome and cramps.
The US Food and Drug Administration (FDA) warned of the dangers of aristolochic acid in 2001. But the October study cited the FDA's "failure to protect the public from the imminent hazard of aristolochic acid."
Another study, which was published in the September 17, 2003 edition of the Journal of the American ...