Vitamin B1 or thiamine is an important vitamin that helps in giving a lot of energy. The cells in our body require this vitamin for carrying out various functions. It helps in improving the metabolism. Deficiency of this vitamin affects the functioning of heart. Lack of Vitamin B1 in diet causes poor functioning of digestive organs and nervous system. It causes degeneration and weakness. You can preventing the deficiency by including foods that contain this vitamin. Include legumes, nuts, beans and sunflower seeds in your diet. We will tell you about some other food sources of Vitamin B1. The top 10 Vitamin B1 rich foods are as follows.