Tag: Excess 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.

According to the National Institutes of Health, toxicity from high thiamine intake via food or supplements is not evident because the body excretes excess amounts in the urine. This does not mean it is entirely without risk, so understanding what happens if you have excess thiamine is important for anyone considering high-dose supplementation.