Consumers of natural health products beware. The majority of herbal products on the market contain ingredients not listed on the label, with most companies substituting cheaper alternatives and using fillers, according to new research from the University of Guelph.
The study, published today in the open access journal BMC Medicine, used DNA barcoding technology to test 44 herbal products sold by 12 companies.
Only two of the companies provided authentic products without substitutions, contaminants or fillers.