I designed and marketed "stacks" combined in a simple, small capsule for several years.
The best was galantamine, noopept, acetyltyrosine, and cdp-choline. It was beloved by many.
However, my magnum opus could have been stacks that changed daily, to prevent any neurochemical adaptation or tolerance.
But, at some point the almighty paycheck hijacked my brain. Why not include money as an anti-nootropic in your study?
Judging by the boundless stupidity we are seeing in the world of oligarchs now, maybe too much money is tge ultimate anti-nootropic /s