Vitamin
Vitamin B1
Vitamin B1, or thiamine, is an essential water-soluble vitamin found in whole grains, legumes and pork, and is needed to turn food into energy.
Also listed as Thiamine, B1, B-1
Is there an upper limit?
The US Food and Nutrition Board established no upper limit because adverse-effect reports were lacking, while cautioning that excessive intakes could still cause harm. Furosemide can lower thiamin levels. 1
Who is at risk of deficiency?
DGE identifies illnesses affecting intake, absorption or metabolism, including severe pregnancy vomiting, gastrointestinal or liver disease and chronic alcohol misuse. 2
For information, not individual medical advice. Ingredient studies do not establish the effectiveness of these products.