Symptoms of vitamin B1 overdose

Vitamin B1, or thiamine, supports normal cell function and helps your body convert food into energy. Symptoms of thiamine overdose are unlikely to occur, as this vitamin will be excreted in the urine when consumed in excess. On the other hand, a vitamin B1 deficiency can be much more harmful.

An overdose of thiamine does not cause toxicity. In fact, there is no upper limit for this vitamin. Read on to learn more about how to safely add more vitamin B1 to your diet.

The role of vitamin B1

B complex vitamins play a key role in energy production and metabolism. Some promote growth and development, while others support the formation of red blood cells, keep your brain alert, or act as coenzymes in various biochemical reactions. Thiamine helps your body process nutrients in food and use them for fuel. It regulates glucose metabolism and supports immune function.

The human body can store about 25 to 30 milligrams (mg) of thiamine, according to the Office of Dietary Supplements of the National Institutes of Health. About 80% of this amount is stored as thiamine diphosphate and helps your body metabolize fats, carbohydrates and amino acids.