Be aware of taking high B1 doses if you hava a SULFA ALLERGY. Thiamin, or B1 contains sulfa, (link below).
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Maybe I should have read this thread
before starting my B1 experiment
Oh well.
I do have problems with sulfa so that might explain why it's not worked for me and why I've been getting a lot of headaches on it. I came on to ask if it could be causing headaches / migraines, but I guess I've found my answer. Also, somebody above said something about it not being good for low thyroid, and I am hypothyroid, although taking thyroxine for it.
I wasn't feeling good, in relapse mode to start with, but thought maybe the B1 would help improve me. I've been taking 100mg tablets and upping the dose by a tablet per day. I'd made it up to 1100mg a day but have now stopped, because I was getting headaches every afternoon, after taking half the dose at lunch, and then migraine headaches in the evening, after taking my other dose with my evening meal. I'm now presuming the headaches were a side-effect of the B1 (although I do get a lot of headaches / migraines generally).
I didn't notice any improvement in the way I felt otherwise, no increase in energy and no effects, good or bad, on sleep. So I think that's the end of my B1 experiment.
Should have known it was too good to be true
and too easy
and too cheap
PS I have taken 100mg B2 every day for several years, and I think it has lessened my incidence of migraines. And I'm currently not taking a B complex, although I know you're not meant to take the Bs in isolation