There are unusual individual conditions that apparently cause a very few to need B12 treatment constantly. That is not the norm, and in fact it is extremely unusual for a person to require shots nearly that frequently or to have rapid depletion from stress. But because of varying abilities to transport the B12 once it is absorbed, store the B12, and use it normall once it is absorbed and stored, there are unusual cases.

For most people the daily oral dose is best in the long run, and especially when they are able to obtain methylcobalamin. If not, cyanocobalamin or hydroxocobalamin will work for most who need B12.

rose