Thiamin HCL, i take 100mg daily, sometimes 200mg. Caffeine will be 1 cup of milk tea, which would be around 10mg of caffeine. after reading up, yesh if counter each other. you just gotta try what works for you. I had a day where I had totally no word blocks, and smooth, it was godlike and it was just after my 1 week army camp. I did not take any supps there. Eat relatively healthy diet, with some caffeine occasionally. Perhaps its the high fat intake plus nofap i had during that time, high fat diet = high acetylcholine production.