Aim: To study the level of awareness on vitamin B12 deficiency among the general population and to educate the population on preventive measures. Objective: To study the causes, signs and symptoms, treatment, investigation and prevention of vitamin B12 deficiency among the general population and to educate the population on preventive measures. Background: Vitamin B12, or Cobalamin, is a water-soluble vitamin and plays a vital role in the normal functioning of the brain and the nervous system and in the formation of red blood cells. It also helps to regulate and synthesize DNA. It occurs in animal products, such as fish, meat, eggs, and dairy products. Vitamin B12 deficiency can result in irreversible and potentially severe damage, especially to the human nervous system and brain. It can also cause anemia. Reason: This study is done inorder to understand the role of vitamin B12 and also help in the prevention and better treatment of diseases associated with its deficiency leading to better quality of life.