Plays a key role in converting
carbohydrates into energy. It is required for the production of hydrochloric acid, for forming blood cells, and for maintaining healthy circulation. 

Just like all B-vitamins, B-1 is a water soluble and cannot be stored in the body. It must but must be replenished on
a daily basis. B-1 is also works best when taken in a balanced complex of the other B vitamins.