b12 injection fatigue Beat Holiday with a shot Chronic Fatigue: Can B12 Shots

The rate at which the vitamin is absorbed is the primary distinction between B12 injections and infusions

How Often Should I Get a Vitamin B12 Injection

Because of how vitamin B12 is absorbed, the most common risk factors for B12 deficiency are: Genetic susceptibility : Some people genetically produce less intrinsic factor and stomach acid needed for B12 absorption

But if your B12 is high without supplementation , it can be a marker for underlying conditions that require medical evaluation, including liver disease, kidney dysfunction, and certain cancers

This is still being studied, but the clinical experience to date is consistent with this hypothesis