b12 injectables Vitamin for Injection Cyanocobalamin 1,000 mcg, 25/Box (Rx) — Mountainside Medical It is used to prevent and to treat vitamin B12 deficiency Vitamin B12 Injection: Energy Boost
Description
While some patients might note transient mild fatigue or a brief period of mental haziness post-injection, its typically not of significant concern

Have you read about reversing out symptoms

Individuals with a Deficiency: Certain people face a higher risk of low B12 levels

Make sense
Depending on your circumstances, multiple injections may be necessary to achieve optimal B12 levels

These shots keep Vitamin B12 levels good and stop deficiency from coming back