Vitamin B1 is a form of thiamin Mononitrate which is an essential vitamin involved in metabolic energy supply. It is critical for normal growth and development of poultry and also necessary for proper carbohydrate metabolism to provide energy for the body, especially the brain and nervous system. Thiamin also plays a role in muscle contraction and conduction of nerve signals. The deficient birds show anorexia, loss of weight, ruffled feathers, dropping of wings and muscle paralysis of muscles.