No need to tell me how to find more recent papers, Bostonian. wink I do this all day long. There is a vast wealth of research on this subject. The issues is going to be finding some good meta-analyses that are coming from people without an axe to grind (of any sort). For instance, the "more recent review" you linked to in the previous thread is not a meta-analysis, nor even a study. It's clearly an opinion piece. It's interesting reading, but I suspect it was heavily cherry-picked.