why give vitamin b12 injections The Advantages of Versus Oral Supplements: Shawn Veiseh, M.D.: Family Medicine Benefits of Vitamin B12 Injections

No nausea or constipation

Mild injection site pain and irritation (also known as a sore arm) are common after receiving many vaccinations, including the influenza vaccine, pneumococcal vaccine, varicella vaccine, and COVID-19 vaccine

For 5-amino-1MQ specifically: Preclinical studies have not prominently described heart rate elevation as a dominant signal The mechanism (NNMT inhibition, NAD+ preservation) does not have the same direct cardiac implications as nuclear receptor agonism Human cardiovascular data at clinically relevant exposures are limited For physicians, the current evidence base does not support a major cardiovascular safety flag, but the limited human dataset means confident statements are premature

Can Vegans and Vegetarians Avoid B12 Deficiency Without Injections

Yes, many users report fat loss in stubborn areas like the midsection

Avoid using the intravenous route