I have heard that all 20:1 products on the market do not work because they are using 20 parts chinese to 1 part south african hoodia. Countless people have said the chinese versions do not work. It's all about the
I myself have tried some of these and they did not work. In fact, I have bottle of the stuff that didnt work for me here and the capsules have a brown powder in them, while the powder in the product I have now that does work, has a greenish tint to it.
They dont even look like the same product!
You should have read these forums before ordering.

Lots of success stories here with the right stuff.