Originally Posted by Marimac
1000Mcg is not that great an amount of B-12 if the numbers have you concerned.
I agree. A DAILY dose--oral or i.m.--of 500 to 1,000mcg for one to two months, followed by weekly doses this high, and then once or twice a month after normalizing, would be closer to standard treatment for b-12 deficiencies.
It is possible you are simply being under-treated.