b12 injection and covid vaccine FDA approves Pfizer-BioNTech's Omicron XBB.1.5-adapted funny taste in mouth after

B-12 shots are a popular way to get the daily recommended amount of this vitamin, as they provide a concentrated dose that can be quickly absorbed into the bloodstream

Vitamin B12 shots are generally safe, with minimal side effects such as mild soreness at the injection site

The benzyl alcohol preservative has been linked to severe toxicity in this population, including a potentially fatal condition known as gasping syndrome. Newborns have immature metabolic pathways and cannot efficiently metabolize benzyl alcohol, leading to its accumulation and metabolic acidosis with respiratory failure in severe cases

Some patients have also experienced a hypersensitivity reaction following intramuscular injection that has resulted in anaphylactic shock and death