Thiamine is important in the production of energy.
Dairy products and milk, fruits, and vegetables are not very high in thiamine. However, when they are consumed in large amounts, they become a significant source. It is also essential for the functioning of the heart, muscles, and nervous system. The best way to get the daily requirement of essential vitamins is to eat a balanced diet that contains a variety of foods from the food guide pyramid . A deficiency of thiamine can cause weakness , fatigue , psychosis, and nerve damage.