Tag: Intravenous thiamine

Fact: Because thiamine (vitamin B1) is a water-soluble vitamin, the human body is exceptionally efficient at excreting any surplus, making unnaturally high levels in the blood a rare occurrence. When it does happen, understanding what causes high thiamine levels in blood is crucial, as it is almost never a result of dietary intake alone.

While severe vitamin B1 (thiamine) deficiency is a well-documented cause of serious health issues like Beriberi and Wernicke-Korsakoff syndrome, the question of whether **can vitamin B1 cause problems** from excess intake is a common concern. As a water-soluble vitamin, excess thiamine is naturally and safely excreted by the body, making adverse effects from typical dietary intake exceptionally rare.

According to the National Academy of Medicine, no established toxic level of thiamine (vitamin B1) has been reported in the literature. As a water-soluble vitamin, any excess thiamine consumed orally is typically excreted through the urine, making toxicity from food sources or supplements highly unlikely.