The dosing question is a question for a medical professional. I found 5000 mcg per day gave constant pins and needles sensations though so went back to 1000 mcg.
@oceanofsound26 - tx for response. I am getting that sensation just after one week of ~1000 mcg dosage (am taking b12 spray since that was advised). How many days did the sensation last for you? also how much was your b12 level when you started supplements and how many months did it take to get to normal range (I was at level 190 when I started with supplements)
Never the had the pins and needles with the 1000 mcg dose. I cannot remember my exact Vit B12 level when I started as that was over a year ago now but it was borderline low but got back up to normal levels after 4 months. Did not help my tinnitus though but I am fully habituated now so my tinnitus does not bother me.
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