swelling after b12 injection What happens if you inject wrong? Is Your Injection Site Reaction

While feeling great is a key indicator, objective data from a lab gives you the concrete evidence needed to confirm your treatment is really working

StatPearls (US source) states, Patients generally receive lifelong intramuscular (IM) injections of vitamin B12 (typically 1000 g per month)

However, the top two ranked administration routes were the oral route (78.3) and the IM route (49.6)

Gently swirl or roll the vial until the material is fully dissolved

This allows the vitamin to be absorbed directly into the bloodstream without having to go through the digestive system, reducing the risk of malabsorption in the stomach