Mercury, arsenic, and lead levels in herbals

Researchers from the Food and Consumer Product Safety Authority, in The Netherlands measured levels in Asian traditional herbal preparations that are available on the Dutch market.

First, the details.

• Between 2004 and 2007, 292 traditional herbal preparations used in Ayurveda, traditional Chinese medicine, and traditional Tibetan medicine were tested for mercury, arsenic, and lead.
• Samples were mostly multi-ingredient traditional herbal preparations containing herbs and minerals.
• Estimated weekly mercury, arsenic, and lead intake levels were calculated for each traditional herbal preparation based on the measured concentrations and recommended dose.

And, the results.

• The labels on fewer than 20% of the traditional herbal preparations suggested the presence of mercury, arsenic, or lead.
• These elements were found in 186 (64%) of 292 traditional herbal preparations.
• In 59 (20%) traditional herbal preparations these levels significantly exceeding safety limits.

The bottom line?

The authors concluded, “Mercury, arsenic, and lead contents of traditional herbal preparations used in Ayurveda, traditional Chinese medicine, and traditional Tibetan medicine remain a cause for concern and require strict control.”

These findings are not surprising. Researchers in Boston have identified a similar situation here, and here.

3/8/10 20:32 JR