how soon do you feel the effects of b12 injection Vitamin Injections Vitamin B12 Injections: Hot Shots?

2015 Jun;48(6):e11-26

Weeks 1-4: tirzepatide only phase During the tirzepatide-only phase, the primary change is appetite reduction

History [edit] Descriptions of deficiency effects [edit] Between 1849 and 1887, Thomas Addison described a case of pernicious anemia, William Osler and William Gardner first described a case of neuropathy, Hayem described large red cells in the peripheral blood in this condition, which he called "giant blood corpuscles" (now called macrocytes), Paul Ehrlich identified megaloblasts in the bone marrow, and Ludwig Lichtheim described a case of myelopathy

Where Do You Get Vitamin B12 From

Involved in energy metabolism