vitamin b12 injection age limit Shots: B12 Injections Benefits, Uses, Risks B12 Injections: Who Should Get
Description
By influencing S-adenosylmethionine (SAM) levels, it also plays a role in epigenetic regulation and longevity-related gene expression, linking energy metabolism with cellular lifespan

Keep consecutive injections at least one inch apart from any previous site, and avoid any area that is bruised, scarred, inflamed, or still tender from a previous dose

They put vitamin B12 directly into the muscle

The most common side effect is simply pain at the injection site
