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Member Since 16 Apr 2014
Offline Last Active Aug 20 2015 01:40 PM

#946590 Lost

Posted by on 03 June 2015 - 09:35 AM

There is a really large gray area with vitamin B12 where symptoms of deficiency can occur even though the lab result says normal. A typical reference range for serum B12 is 200-1000. Symptoms, which can include fatigue, dizzy spells, and fainting (as well as others), can occur in levels below 400. If the problem is not with your thyroid, you might check into whether B12 is the culprit.

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