Eating foods high in B1 is crucial to prevent symptoms of vitamin B1 deficiency. Vitamin B1 also knows as thiamin, is a water-soluble B vitamin involved in energy production in the body. It is vital for the nerves and nervous system's health and required to maintain proper muscle tone. If you have the following signs of vitamin B1 deficiecy you will want to make sure you are eating foods high in vitamin B1. ~ Didem