best to inject b12 subcutaneously or intramuscular How Give a Injection: Step-By-Step Instructions Cyanocobalamin Vitamin B12 Injection 1000
Description
Vitamin B12 is available in two forms that are given through injection

This experimental model was used to assess the leukocyte expression patterns of 11 biomarkers previously associated with VCD in long COVID and explore the potential of pharmacological B12 in regulating these genes

In contrast, insulin-stimulated glucose uptake in adipocytes require AKT2, the predominant isoform in key insulin sensitive tissues (120)

Could the reason of symptoms be b12 oversose

When considering cost, factor in supplies (syringes, bacteriostatic water, alcohol swabs) and potential medical supervision fees
