doi:10.1016/S0969-2126(98)00073-2
The Cochrane Collaboration, Chichester, UK: John Wiley & Sons
From my experience as a medical professional, B12 injections do play a role in improving energy levels, especially for those who are B12 deficient
For individuals with atrophic gastritis, pernicious anaemia, or those taking proton pump inhibitors , food-bound B12 absorption is already compromised
Because high-quality safety data for subcutaneous lipotropic therapy is still limited, its especially important to report any unusual or persistent symptoms to your care team and to seek prompt medical attention for severe reactions such as difficulty breathing, chest pain, or signs of an allergic reaction