But for late night studying, I like to avoid stims so I can sleep. I've been using a self made stack to somewhat resemble a stim-free version of FXT (just guessing):
2g sns choline citrate (instead of fxt's bitartrate)
i know it's missing the other ingredients in fxt (like huperzine, dmae, vinpocetine, caffeine...), but it works like a 75% version of FXT for me.
sometimes i'll add AMS Lucidrol to the above stack (still stim free).
Bacopa Monnieri = 500mg
DMAE = 250mg (an ingredient in FXT)
Rhodiola Rosea = 200mg
BetaPEA = 196mg
Picamilon = 100mg
Hordenine = 40mg
Piperine = 3mg
One thing missing from any custom stack to resemble FXT is the obvious TASTY BEVERAGE TO DRINK. taking all these self-made caps and/or bulk powder form isn't that fun. SNS does an excellent job of masking the nasty nootropic taste.