are b12 injections dangerous Vitamin | Energy Boost How Long Does a B12

Only your overall health and body composition can answer this question

S2CID 16216532

If you have a temporary deficiency or increased requirement (say, after a surgery or during recovery from an acute illness), you might only need a short course, perhaps a few weeks of injections, until your vitamin levels normalize or you can meet your needs by mouth again

You may benefit from more B12 if you experience: Constant fatigue or weakness Numbness or tingling in hands or feet Poor concentration Low mood or irritability Shortness of breath If these sound familiar, speak with a healthcare provider

The range of time that B12 injections can last will depend on factors like a persons metabolism and how often the injections occur

What are the benefits of taking B12 supplements