The best and most correct answer among the choices provided by the question is the first choice "They are heavily regulated by the Food and Drug Administration."
A herb is a plant or plant part used for its scent, flavor, or therapeutic properties. Herbal medicines are one type of dietary supplement. They are sold as tablets, capsules, powders, teas, extracts, and fresh or dried plants. People use herbal medicines to try to maintain or improve their health.
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