When people hear about vitamin B12 they often think of the vitamin B Complex consisting of B1, B2, B3, B5, B6, B7, B9, and of course B12
Its deficiency can lead to fatigue and lethargy
Low vitamin B12 levels are more common among those who: If youre experiencing troubling symptoms or believe youre at high risk for a deficiency, raise these concerns with a healthcare provider, who may decide that you should be tested
If you have malabsorption syndrome (such as short bowel syndrome, certain bariatric surgery patients, chronic pancreatitis, or celiac disease that severely impairs nutrient uptake), you might need these injections indefinitely to prevent recurrent deficiencies
Office of Dietary Supplements