Vitamin B12 is essential for red blood cell production and nervous system development. However, taking too much vitamin B12 can also lead to serious consequences.

Vitamin B12 plays many roles in the body. However, the human body cannot produce or store this vitamin, so it must be obtained from animal foods or supplements on a regular basis. In fact, supplementing too much or too little vitamin B12 is not good for health, so consider using an appropriate amount or supplementing as directed by a doctor.