Paediatric and Perinatal Epidemiology , 32 (1), 100111
But How Long Do Reactions Last
Serum B12 reference ranges vary between laboratories, but generally, levels below 148 pmol/L are considered deficient, whilst levels between 148258 pmol/L are regarded as borderline and may warrant further investigation or a trial of treatment, particularly if symptoms are present
You have some wiggle room, but if you fall off your schedule for too long, those signs of fatigue will inevitably return, and they almost always arrive on the scene before any other symptom does
However, it would be best to take it at the same time each day to avoid the chances of missing a dose