The weight loss claims here are of course anecdotal, but it certainly seems worth a try, given that it seems perfectly safe. Presumably the worse that can happen is you simply pass it out of your system and it does nothing.
I slightly regret the response now actually, I was being quite majorly hand-wavey, I guess the fact that there is a great deal of uncertainty here and the promise of easy weight loss has combined to provide some bias here :-)
In October 2000, the FDA warned [Karl Loren] that the long list
of therapeutic claims he was making for these products made them
drugs would be illegal to market without FDA approval. The letter
stated that the FDA had seen no evidence that the products were
safe and effective for their intended uses.