A deficiency of vitamin B1 causes Beriberi
Weakness and muscle loss, Mental confusion, Tingling or loss of sensitivity in the fingers or feet, Fatigue, Rapid heartbeat, Chest pain, Nausea or vomiting, Fever
Beriberi may proceed into Korsakoff syndrome, a type of encephalopathy, which refers to damage or disease that affects the brain if these symptoms are not treated when they first emerge. One of the main symptoms of Korsakoff syndrome is severe disorientation and memory loss, which can be brought on by extensive damage to certain areas of the brain, including the thalamus and hypothalamus.
