Thiamin Overdose, Toxic effects of excess intake

Toxicity is very rare as excess thiamin is excreted in the urine. Long-term excessive use can produce symptoms of hyperthyroidism: headache, irritability, trembling, rapid pulse and insomnia. With injected thiamin, reactions of itching, weakness, gastrointestinal bleeding, low blood pressure, pain, sweating, nausea, tingling and faintness can sometimes occur.

Thiamin OverdoseThe lowest daily dose known to cause side effects is 5 mg, but many people can tolerate much larger doses.

 

 

 
 
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