Ancient,but how safe?

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Like many people these days, Lori Potter, a 50-year-old massage therapist living on Kauai, Hawaii, has explored alternative healing for everything from headaches to skin problems. So when she wanted to boost her immune system and lower her stress levels a few years ago, she made an appointment with a visiting practitioner of ayurveda, a medical system that originated in India thousands of years ago and has gained wide popularity in the United States.

He prescribed herbal supplements, which he tested himself for impurities, to help boost her immunity. Soon, Potter said, she felt more energetic and her digestion was better. After two years, the practitioner stopped visiting the island, and she has not taken any supplements since, she said, because she has not met any practitioners she trusts.

“You never know what’s really in these supplements,” she said. “This is serious stuff, and you can’t just take them without knowing the source.”

Potter may be right to be wary. A report in the recent issue of The Journal of the American Medical Association found that nearly 21% of 193 ayurvedic herbal supplements bought online, produced in both India and the United States, contained lead, mercury or arsenic. Almost all of the products were sold through American Web sites. “Some manufacturers advertised that they test for metals, and their products still had them,” said Dr Robert B Saper, assistant professor at the Boston University School of Medicine and lead author of the study. The average consumer, he said, “has no way of determining which supplement is free of contaminants and which isn’t.”

No one knows the exact numbers of arsenic, mercury or lead poisoning illnesses in the United States related to ayurvedic medicine. Dr Saper estimated that there have been 80 cases since 1978, but he believes that is just the “tip of the iceberg.” In 2005, the Centers for Disease Control and Prevention reported a total of 12 cases of lead poisoning associated with ayurvedic products in Texas, New Hampshire, Massachusetts, New York State and California.