I went rite aid and bought B1 vitamins i decided to take 300mg thiamine and 3 hours later i was working and noticed my speech was 80% fluent i would always stutter when helping clients but then i started talking to them and i would noticed that i didnt get blocks as much and i could say words just fine it was like night and day, im going to go with 400mg today , it definitely did something ,brand is rite aid, i have tried just about everything includind lions mane but it didnt help at all Bottle info: Rite aid Vitamin B-1 100mg Essential for proper nerve and muscle function 100tablets Edit: almost died last night and had to go to emergency for taking the wrong vitamins lol at least I'm still alive I bought b1 and vitamin A on accident cause they looked the same and I took vitamin A before going to bed 3x the lethal dose and almost had a heart attack ,live n learn