Vitamin B12 is naturally found only in animal products like meat, fish, eggs, and dairy, or in fortified foods and supplements, as plants do not produce it
If you accidentally take your supplement twice in a day, for example, your body will excrete whatever isnt used or needed to be stored
And many GPs seem entirely unaware that guidelines have changed
Untreated pernicious anemia can cause vitamin B12 deficiency leading to megaloblastic anemia and neurological disorders, even in the presence of adequate dietary intake of vitamin B12. 7
For clinician-directed use
Hydroxocobalamin can be naturally produced by gut bacteria when digesting food but is also another man-made form of B12 that can be easily absorbed and used by the body