If I understand rightly you haven't an absorption problem.So once on supplements or a richer B12 diet you can store and utilise b12 from your liver
B12 helps with the formation of DNA, the genetic material found in your cells, to ensure stability of your chromosomes when regenerating methionine for protein synthesis and methylation
The peptide structure includes modifications that resist degradation by dipeptidyl peptidase-4 (DPP-4), an enzyme that rapidly breaks down natural GLP-1
UK treatment for severe deficiency involves hydroxocobalamin 1mg intramuscular injections, with regimens varying based on neurological involvement
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In this study, serum vitamin B12 levels were significantly higher in the oral (2000g [2 mg] of vitamin B12) compared with IM (1000g [1 mg] of vitamin B12) group at 2months: 643328 vs