Vitamin B1 is also known as Thiamine and is one of the 8 B vitamins. In common with all the B vitamins it is water-soluble and so the body does not store it.
Vitamin B1 contributes to normal energy yielding metabolism. Thiamine also supports the digestive system and intestinal health, and also the nervous system.
Some research also shows that Thiamine supports normal function of the heart, and can help with eye health.