Gotchu Nature Made Vitamin B1 100 mg,... https://www.amazon.com/dp/B000GG2K2E?ref=ppx_pop_mob_ap_share I seen two people both on YouTube say it improved fluency a lot on mega doses like above 1000 mg I took first 300 today, buy it and keep me in the loop I want to see if it works for others. Some study said 30 percent of people saw massive improvements