Plays an important role in maintaining a healthy nervous system and improving the cardiovascular functioning of the body.
Vitamin B1 is one of the eight water-soluble vitamins in the B complex family. It helps in the conversion of carbohydrates into glucose, which in turn is used to produce energy for carrying out various bodily functions. Vitamin B1 is also required for the breakdown of fats and protein.
In addition to these health benefits, it maintains the muscle tone along the walls of the digestive tract and promotes the health of the nervous system, skin, hair, eyes, mouth, and liver.  It also improves the body’s ability to withstand stress and is often called the “anti-stress” vitamin.
A deficiency of vitamin B1 commonly leads to beriberi, a condition that features problems with the peripheral nerves and wasting.
Weight loss and anorexia can develop.
There may be mental problems, including confusion and short-term memory loss.
Muscles may become weak, and cardiovascular symptoms can occur, for example, an enlarged heart.