All of the following statements are true of herbal supplements EXCEPT: they can have druglike effects, the term "natural" is regulated by the FDA when used on an herbal supplement, they can be more dangerous than synthetic supplements, and they may contain unknown and uncharacterized substances?
1) They can have druglike effects.
2) The term "natural" is regulated by the FDA when used on an herbal supplement.
3) They can be more dangerous than synthetic supplements.
4) They may contain unknown and uncharacterized substances.