do vitamin b12 injection go bad Are Shots Right for You? Why do I feel worse

Rare side effects of B12 shots (require medical attention) Serious reactions to B-12 shots are uncommon, but its important to be aware of them: Allergic reaction, including rash, hives, dizziness, or trouble breathing Significant swelling, pain, or warmth that worsens at the injection site Palpitations or chest discomfort Signs of drug interactions, especially if you take multiple prescription medications If you experience symptoms that feel intense, progressive, or unusual, you should contact your provider right away

When Injections Are Medically Indicated People with certain issues might need B12 injections

Consider these critical factors: Purity Levels : Verify certificates of analysis showing 98% purity for cosmetic applications and 99% for pharmaceutical use

Multifunctionality and possible medical application of BPC-157: literature and patent review (2025) Current Pharmaceutical Design (PMC) Sikiric P et al

I also read that damage to/poor liver function is often not factored in for the "older" patient