He has no scruples. Pushing supplements that create greater cognitive thinking in a week is full blown quackery. His "experiment" only proved the power of the placebo. If that young lady felt "smarter" its because she was smart enough to get her face on national tv and claim she was now cured of being dumb.
If Dr.OZ compared all he pushes with the Placebo effect he wouldn't be on TV since it would prove his claims aren't worth a damn.
I caught all this the other day on his quack show. Sponsored by Afleck.