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Thiamin excess
Are there any adverse affects from a high thiamin level (100.4)? Can it cause vertigo, numbness and tingling in toes, or leg cramps?

I have been taking a multiple vitamin (Usana) which contains mega doses of thiamine for about ten years.

Thank you.
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Hello and hope you are doing well.

Thiamin is a water soluble vitamin. So, the excess is usually excreted in the urine. If intake is high, only a small amount of thiamin is absorbed and elevated serum values result in active urinary excretion (Davis et al 1984). The total body content of the vitamin is about 30 mg.

Hope this helped and do keep us posted.
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