The vitamin can be stored in the liver for a long time, so it may take a few years for a deficiency to develop ( Summary Vitamin B12 is a water-soluble vitamin that plays an important role in brain function and red blood cell production
The intervals between injections can differ based on: Absorption Capacity: If you have impaired absorption, such as in pernicious anemia, our healthcare providers may suggest more frequent injections, potentially even on a weekly basis
If your levels are already normal, adding more will not create extra energy your body cannot use
Some people pursue vitamin B12 shots because they believe that doing so will increase their energy levels
For people with severe deficiencies or who need rapid results, injections are often the best choice
Individuals with certain health conditions, such as Lebers disease (a rare inherited eye disease), should avoid B12 supplements as it can worsen the condition