ABSTRACT
We must add a word of caution regarding the last two categories, which, in our experience, are unique inclusions in an herbal intended for popular consumption. The value judgments presented are those formed by the authors after detailed study of literally thousands of books and papers devoted to natural products used as drugs. In most cases, they are not based on the outcomes of the extensive double-blind clinical studies in human beings that the Food and Drug Administration requires to prove a drug safe and effective. Rather, they are founded on the majority of satisfactory evidence obtained from all sources regarding each drug.
