A DNA analysis of 44 herbal products from the US and Canada showed that only 48% actually contained the herb listed on the label and that 1/3 contained contaminants or fillers (also not listed on the label). Some products contained feverfew, which can be dangerous for pregnant women.
The study, which was done by the University of Guelph (Ontario, Canada) did not disclose the names of the herbals that they tested.
So, how do you know what’s in your supplement?
Until the FDA and US government stop this nonsense of not monitoring “food supplements”, you don’t!