Besides giving one extra energy, the B12 shots can help to combat deficiencies of the vitamin that lead to fatigue and weakness
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
In individuals with macrocytic anemia, the prevalence rises to approximately 17%
The exact dose is determined by how bad the injury is and how quickly they want to heal
[Crossref] Andrs E (2017) Oral Cobalamin Therapy for the Patient with Biermers Disease