Here is an interesting read on Irvingiam, seems that it would be pretty effective for controling or lossing weight.
Inhibition of Irvingia gabonensis seed extract (OB...[Lipids Health Dis. 2008] - PubMed Result
Here one that even more interesting: The use of a Cissus quadrangularis/Irvingia gabone...[Lipids Health Dis. 2008] - PubMed Result