content: Phenibut, piracetam, coffee or green tea (theanine), aaaand maybe some kratom for the come down or to offset the jitteriness of caffeine (while going through the day). Been doing wonders for me, for years. Also, nicotine. Knew/experienced this years ago but the research is just coming in? Or, I'm just looking it up and finding it. If you can find a safe way to consume nicotine. (I like General snus. Wintergreen or 'White' which tastes like Earl Grey)    There's a reason they give a dying man a cigarette before the firing squad does their thing! :) So, to my mind nicotine is definitely one of the best, most trusted 'smart drugs' and our bodies have probably adapted to it somewhat by now after a few hundred years of use?  It's anxiolytic (anxiety reducing) and stimulating. The perfect combo. Some science-y articles and such: https://www.scientificamerican.com/article/will-a-nicotine-patch-make-you-smarter-excerpt/ https://examine.com/supplements/nicotine/ Snus: safer than smoking or chewing tobacco. https://academic.oup.com/jnci/article/99/18/1358/925211