I am wary of too-linear a drug having side effects we have yet to discover. As a mostly typical American, I have enough trouble maintaining a sufficiently nutritious diet. Those few times in my life when I have made the extra effort to eat properly and take daily supplements, I have felt holistically better than I even thought possible during periods of depression-inducing malnourishment.

I am in favor of enhancing cognitive ability. However, I do believe we should start with a reserve of nutrients before we introduce a catalyst that is not properly supported with sufficient surplus to maintain the balance of health.

MikeD- You're right, but there's no $ patent in good nutrition. A Or at least not as many.

Stephen-
I'd agree that it seems to be useful to be less dumb- not sure how helpful it is to be smarter.