I mean the days when you are tired, even if you eat well during the day, you are still hungry and irritated, you find it difficult to concentrate, and it is impossible to communicate with people for a long time, or even when you try to hold something in your hand, it seems to slip out.
Creatine works wonders when your brain is in that tired foggy state. 10 g and upwards in the morning do the trick.
💯💯 very much so, also some amino acid supplements like they put in preworkout (I recreate the blends from first principles lol). I noticed with caffeine-free preworkout I stopped craving other stimulants like caffeine & nicotine as badly due to the taurine content lol. which is weird because some people say taurine calms them down & others say it gets them going. I get plenty hyped on my own so those are kind of the same to me. L-carnitine is an interesting one that also seems to work like a study drug & would be important for pure vegetarians as it’s only really found in red meat (100x the content in chicken) + it’s great for muscle recovery
Also l-theanine but that’s well known now. Feels like a study drug but no dependency, you’re not impatient, & you can go to sleep. Your mileage may vary