Hey there. I'm having a similar experience with thiamine. However, it's a bit different. In my case, I had stopped taking thiamine and magnesium completely for a year or 2 and I saw that my stuttering problem was exacerbated. I got a new job and moved to another city. This job didn't require me talking most of the time unlike previous jobs which were sales roles. After getting this job, I had ignored thiamine and magnesium and saw myself struggling with ordering milk and curd as well in the diary shop. Now I've ordered those again and am hoping to be better. I can't take this man. I hate it.