how much vitamin b12 per day injection Dosage: Should You Take Day? How Often Should You Get

Specifically, eligible studies included participants (P) with a confirmed diagnosis of vitamin B12 deficiency, interventions (I) involving oral or sublingual vitamin B12 administration, comparators (C) using intramuscular supplementation, and outcomes (O) reporting changes in serum vitamin B12 or homocysteine levels

Methylcobalamin is felt to be superior to cyanocobalamin because it does not require methylation for activation in the body

NNMT inhibition and metabolic regulation

There is no evidence that vitamin B12 deficiency occurs as part of the underlying disease process in ME/CFS

Heffernan MA, Thorburn AW, Fam B, Summers R, Conway-Campbell B, Waters MJ, Ng FM