Many patients may report an increase in energy and a decrease in fatigue after starting B-complex injections, usually within days to a couple of weeks of regular treatment
The NHS treatment page lays it out clearly: Loading phase (no neurological symptoms): 1mg every other day for two weeks, or until symptoms stop improving
They gave me very professional and helpful advice
Persons taking most antibiotics, methotrexate and pyrimethamine invalidate folic acid and vitamin B12 diagnostic blood assays
Sources Vitamin B12 - Consumer | National Institutes of Health VITAMIN B12: Overview, Uses, Side Effects, Precautions, Interactions, Dosing and Reviews | WebMD Article Vitamin B12 Deficiency: Causes, Symptoms, and Treatment | WebMD Living longer isnt enough if you dont feel your best
Know your starting point