I've searched for any study on that, because its literally the only reason I'd ever take winny. Seems its just anecdotal.
Honestly, I just believed it because jbry said it. He is one of the most knowledgable (and sarcastic) guys on this forum. So I took it as fact. After doing some research, I discovered this is untrue. Guess it's better to do your own research, who knew..