sqad, perhaps: Since having my 'mini' stroke a month ago I have been prescribed & taking a daily cocktail of tablets including vitamin B1. I see the daily requirement (on the internet) as being 1.5 mg for an adult, the caps I've been taking daily are 100 mg., which if my maths are correct is getting on for 700% more than I need !
Can this be necessary & can one o.d. on it ?
Yo can't "overdose" on it but you can have side effects, mainly gastrointestinal. If you idea of "overdose" is synonymous with side effects, then yes you can, but if they aren't, then no you can't overdose on VitB.