Canadian researchers tested the herbal supplements sold by a large number of retailers and found that not only did a lot of them not contain even a small amount of the herb they claimed to be, they were full of fillers and potential allergens.
Like with essential oils, herbal supplements are not tested for ingredients. It’s assumed that what’s in the bottle is what’s on the label – unfortunately, as this article shows, it’s not always the case.
“But the system essentially operates on the honor code. Unlike prescription drugs, supplements are generally considered safe until proved otherwise.
Under a 1994 law, they can be sold and marketed with little regulatory oversight, and they are pulled from shelves generally only after complaints of serious injury. The F.D.A. audits a small number of companies, but even industry representatives say more oversight is needed. “