Why do you have to be off the B-12 for 2 weeks? Is there a cause for your deficiency, other than diet?
Many who are on a vegetarian or vegan diet are deficient in vitamin B-12, since it only comes from animal sources, such as meat, dairy, eggs, etc.
Since your level was so low (89), 3 months on supplements might not have been long enough to get it up high enough to sustain you for any length of time, so, yes, it's possible that symptoms could come back in 4 days...
Hey and thank you for the reply
It was suggested from the lab that I am off the vitamins for two weeks before testing. To see my levels without any "fake" results due to the vitamin being still there
If you're vegan you should continue B12 period.
I have heard you need to stop to be tested but if you're at 89 I'm confused. Levels to be be around 800. Not sure how fast levels can be raised, but diet is a factor and I'd think your levels would drop with pith the B12.