Cochrane Database of Systematic Reviews, (3)
Risks While B12 injections are generally considered safe, especially when administered under medical supervision, there are some potential risks and side effects to be aware of: Pain, Redness, or Swelling at the Injection Site: This is the most common side effect and is usually mild and temporary
Peptide therapeutics: current status and future directions
Your pediatrician may recommend B12 supplementation for your baby to prevent complications
This induces a withdrawal bleed by causing the uterine lining to shed, preventing excessive buildup (endometrial hyperplasia) which can be a risk with infrequent periods
Afterward, those who took vitamin B12 performed better on tests measuring strength, endurance, and speed