A lot of consumers have a preconceived notion that if it's a natural product, it must be safe.
But that is not necessarily the case," said Herbert Bonkovsky, MD, FACG, co-author of the guidelines.
"Most of these products are not well-regulated and have very little oversight.
Traces of heavy metals and prescription drugs have even been found in some herbal and dietary supplements.
We encourage patients to talk to their doctor about all medications they are taking, and herbal and dietary supplements should be no exception.