When your body doesnt produce enough red blood cells, you develop a type of anemic condition known as megaloblastic anemia
i absolutely refer you to anyone looking for B12 therapy
Outcomes depend on a variety of factors including, but not limited to, patient health status, genetics, lifestyle, diet, and exercise
However, it requires a penile injection (which some men find intimidating, even more so than a tiny SC shot in the abdomen) or urethral insertion (which can cause urethral pain)
Of course, there is some degree of variability in results with these types of treatments, because how well your body reacts depends upon its max output ability for collagen creation, which declines with age and is always less for certain people (genetic predisposition)