vitamin b12 injections are they safe shots: Uses, benefits, and side effects B12 and Lipo Shots: NHS
Description
Many people with a deficiency describe deep fatigue, including an "afternoon crash." With infrequent dosing, blood levels can peak and then taper before the next visit

Chris Lam offered great help to the shoulder impingement I had

Allergic Reactions: Rare, but monitor for rash, urticaria, or anaphylaxis

Vitamin B12, also called cobalamin, is a water-soluble vitamin essential for several vital bodily functions, including: Energy metabolism: B12 helps your body convert food into usable energy