No idea. I really do not have a good way to measure this. I am also quite skeptical of things like IQ tests as a means for measuring such things. I've had some in depth discussions with a friend that is a psychoanalyst about these tests and have read up on them myself. My limited understanding is that they are mostly useful for putting a person into a range but getting exact numbers is not feasible, meaning that the tests giving a specific number is really just an approximation in a range and that also varies by which of the two standard tests is used.

If I could get something that could measure exact interaction response times of synapses then perhaps that might be a starting point. The equipment exists but doubt I could even afford the grey-market gear nor do I have a place to put it.

One might ask why I take these molecules if I can not measure efficacy. For me it's simple. They are relatively cheap and there are enough studied benefits that even if the gains are marginal I will find that an acceptable net gain in the big picture of my overall health.

Has it in yours?

Yes I score several points higher consistently in IQ tests, and I have very wild and vivid dreams.

Sorry, meant to reply to you earlier.

I got some Lion's Mane capsules from Amazon (though I'm not sure how pure they are; for all I know they crushed up some whitecaps and put those in there). I started with 1/3 the recommended daily dose and started having slight headaches. That was the end of that experiment. :-(

How do you avoid the practice effect as a confounder in frequent IQ testing?

Don't get me wrong, if you feel like it helps you then go for it, but objective claims deserve objective evidence.

That doesn't answer the question about the confounding factor.

You're right. My mistake.