9 Signs And Symptoms Of A Vitamin B12 Deficiency

7. Weakness and Fatigue

People with a vitamin B12 deficiency often experience weakness and fatigue. Your body needs this vitamin to produce red blood cells. These cells are tasked with carrying oxygen throughout your body. If you have a deficiency in vitamin B12, you may suffer from anemia. This would mean that your body may not be producing enough red blood cells to do this job efficiently. This can leave you feeling tired and weak.