As a result, unsubstantiated claims of effectiveness are commonly implied in product messaging, as is a lack of balanced information pertaining to the potential for side effects.
Until the recent implementation of the Dietary Supplement Nonprescription Drug Consumer Protection Act (January 1, 2008), there was no provision under any law or regulation that the FDA enforced that required a marketer of a dietary supplement to disclose to FDA (or to consumers) any important safety information regarding their product
As a result, it is conceivable that adverse effects associated with dietary supplement use have been historically underreported and underestimated