mayo clinic b12 injection how often Shot for a B12 Deficiency: Is It Worth It? 4 Benefits of B12 Shots
Description
If all three answers are yes, it should still be effective

PMID 17457338
Because B12 injection Treatment delivers the vitamin directly into your body rather than through your digestive tract, it skips the slow absorption route that oral pills depend on, so you tend to feel the difference sooner and hold onto it longer than you'd expect

Its especially useful for injections in the deltoid muscle when using solutions that can cause discomfort or staining

Some patients report feeling less energetic during the initial months of treatment, with gradual improvement as weight stabilizes and metabolic adaptation occurs
