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gwern comments on Firewalling the Optimal from the Rational - Less Wrong
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The first time I took supplemental potassium (50% US RDA in a lot of water), it was like a brain fog lifted that I never knew I had, and I felt profoundly energized in a way that made me feel exercise was reasonable and prudent, which resulted in me and the roommate that had just supplemented potassium going for an hour long walk at 2AM.
Experiences since then have not been quite so profound (which probably was so stark for me as I was likely fixing an acute deficiency), but I can still count on a moderately large amount of potassium to give me a solid, nearly side effect free performance boost for a few hours.
Besides my dosage question: have you noticed any sleep benefits to supplementing potassium?
I think a general high water high electrolyte diet has benefited my sleep. I haven't noticed potassium immediately before bed decreasing sleep quality.
Well, I've finished ~2 months of data. The Zeo sleep stats say that there is a major negative effect, so I'm going to chalk up potassium as a failed experiment for me:
I also replied on Reddit... but I'm wondering if co-administering magnesium would fix this. Or test if Concentrace (http://www.amazon.com/Trace-Minerals-Concentrace-Mineral-Drops-Glass/dp/B004AC07G6/ref=sr_1_2?ie=UTF8&qid=1356074954&sr=8-2&keywords=concentrace), mostly my favorite commercial supplement and a highly bioabsorbable magnesium, improves sleep quality.
Replied there: http://www.reddit.com/r/Nootropics/comments/1578ly/does_potassium_hurt_anyone_elses_sleep/
Hm, interesting.
I've just finished my followup experiment: http://www.gwern.net/Zeo#potassium-morning-use
I standardized a smaller dose, blinded consumption, and took it immediately upon awakening. The negative effect was much smaller (as expected) but there was still no apparent benefit.