For many the dose of B12 does not show a difference in the short term. Generally, it is more of a long term difference.

Of course, one is not guaranteed that all damage will be repaired, but much often is over a long period of time (in those who have not been treated early). And symptoms can be so subtle for so long (and so confusing and seemingly unrelated), that frequently the damage has been occurring for much longer than one realizes until seemingly unrelated things begin to improve.

How long did you stop B12 prior to each of those test samples being drawn?

rose