GREATE SERVICE! GREAT RESEARCHER!

An excellent answer. Well done.

Extremely prompt (unbelievably so!) answer and authoritative in terms
of citing the references used.  From the point of view of a librarian
(which I am, tho' obviously not in law), the Google system cannot be
my final answer because I cannot check on the credentials of the
answerer.  But I am quite impressed with the prompt, clearly worded,
and articulate answer.

I suppose there isn't much scientific info out there about depression
and low energy about this herb.  I am glad to know about the useful
info that it is a staple in Peruvian diets and seems to be
non-harmful.  Thanks.

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This answer has not been rated.

Perfect answer, I am fully satisfied

Thanks, the answer clarification was really usefull, just a pitty the
search is very US, UK oriented

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RICHARD-GA WAS VERY PRECISE AND HIS ANSWER BENEFICIAL

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Great work richard-ga!!and anyone else that researched.Will use you
again and again.
Wal-ga

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Dear Richard:  Thanks for your thorough research.  Very helpful and
extremely rapid reply.  renoir-ga

Thank you richard-ga, sorry it took me so long to return my rating. 
The information was very useful for my taxation research paper! 
Thanks again, taxcrazed

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Some good ideas, thanks !

Very knowlegable answer.  I have asked for clarification of the answer.

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Thanks for this vast amount of useful links. This gives me plenty of
material to study. Thank you very much.

I still need clarification on the last part of the question.  Who in
the government would be interested in this line of problem solving? 
Thanks for your help.

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This answer has not been rated.