Eat Thiamine (Vitamin B1)

Thiamine is needed to help produce energy from the carbohydrates that you eat. It also is required for normal functioning of all body cells, especially nerves. A thiamine deficiency can led to beriberi (an ailment of the nervous system), fatigue, mental confusion, loss of energy, nerve damage, muscle weakness, and impaired growth. This condition is very rare in the United States because most people consume plenty of grain products. Since thiamine is a water-soluble vitamin, the body excretes excess amounts that you consume, so nothing is left behind to slow down your metabolism or increase your weight.