I'm attempting to learn a very specific skill (perfect pitch) and I'm considering nootropic supplements.
While I can find plenty of websites offering these supplements and making big claims, I can't find any rigourous scientific experiments backing these claims.
On the other hand I can't find any rigourous scientific experiments debunking them.
I would imagine such an experiment would not be too hard to set up; for example, performance on a simple "pairs" card game could give a measure of short-term memory.
How might I intelligently go about searching for such experimental results?