Jan Barger said:

.  But it might be a good idea to get ahold of their practice act in
>your state (any of us), and/or talk to one and find out exactly what they
can
>& cannot do...  Mardrey, are you there?  Can you talk?

In Illinois, where Jan lives and where I am a licensed chiropractor,
 chiropractors have rather liberal boundaries of practice.  Acupuncture
(given that they have had the course in profesional school) is allowable.
 Dispensing vitamins - read that- FOOD supplements are as well.  Herbs would
be included in that, I believe.    Other states have tighter scopes of
practice.  In some states chiropractors can't even look in someones' ear
 (Massachusetts) or draw blood for laboratory tests.  .

Two things:

Yes, getting hold of the state's practice act would help.

 But as herbal medcine is not taught in all chiropractic schools [if any of
them] it is up to each chiropractor to educate himself by going to seminars
or reading about the use of herbs.  If a chiropractor is using herbs in his
practice I would question him [in a friendly way] about how he acquired his
expertise in that field.  Many chiropractors, but not all, do use alternative
methods of healing which are not necessarily taught in school. But many of
them are responsible about educating themselves in the proper use of
adjunctive therapies.  Nutriton is taught in chiropractic colleges.  My
course did not include the study of herbs but that was twenty years ago.

Mardrey Swenson