pernicious anemia is treated with injections of vitamin b12 because Anemia: Genomics and Deficiency Pernicious Anemia Causes | Result

Blunted or impeded therapeutic response to vitamin B12 may be due to such conditions as infection, uremia, drugs having bone marrow suppressant properties such as chloramphenicol, and concurrent iron or folic acid deficiency

I came in for a few weeks and my pain has subsided considerably

Nygrd O, Refsum H, Ueland PM, and Vollset SE (1998)

For patients on established B12 injection therapy, monitoring is based primarily on clinical response and haematological parameters rather than routine serum B12 measurements, which may remain very high without indicating harm or overtreatment

Unlike pills, injections deliver nutrients directly into your bloodstream for better absorption

Generally speaking, lipo injections can be administered up to twice a week