S.D.
I suggest you look at the www.wikipedia.org article on hoodia. It seems that about half of the products on the market that say hoodia don't contain the active ingredient that suppresses appetite. That's because the plant is protected in most African countries. Pfeizer has been trying to manufacture a sythetic hoodia product without much success. They have found that is causes problems for the liver in their trials.
A poster here at momsource confirmed that when she said she ended up in the ER because of a hoodia product she was taking. She was responding to a question posted earlier about hoodia. Check the message board.
Bummer, because I was hoping it would work for me too!
S.