DNA barcoding detects contamination and substitution in herbal products

Whether those herbal supplements you’re taking actually work is only half the question.

Now you have to wonder if there are any herbs in them at all.

The New York Times reports recent DNA testing by Canadian researchers shows one out of three herbal supplements tested had no trace of the supplement at all.

Many others were mostly cheap fillers like powdered rice and weeds.

The study looked at 44 bottles of popular supplements sold by 12 companies.

A nonprofit group that supports herbal supplements says quality control is an issue, but not as bad as in this study.

The findings were published in the journal BMC Medicine.

For more information, go to: www.biomedcentral.com

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