im b12 injection dose Oral vs. Intramuscular Vitamin in Vitamin B12 Deficiency • The Blood Project Cobalamin (vitamin B12) and Folate
Description
These include eggs, dairy products, fish, shellfish, and fortified cereals

But in fact, the term pernicious anemia means a specific vitamin B12 deficiency caused by the loss of the bodys ability to make intrinsic factor. Intrinsic factor is in the lining of the stomach, so a weakened stomach lining (which is called atrophic gastritis can cause pernicious anemia
And the creams and serums you have tried

10.1136/bmj.i4919 [DOI] [PMC free article] [PubMed] 22.Higgins JPT, Jackson D, Barrett JK et al (2012) Consistency and inconsistency in network metaanalysis: concepts and models for multiarm studies