Too low: Rather than ask, "Serious?" -- please address this. It may be hard to get enough sunlight in the northern US in winter, and it's time to ask your physician about diet (worth considering -- fortified foods or the few that are naturally rich) and/or supplementing (easier). I'm glad this was detected. You may find you feel MUCH better once this is addressed.
Answered 12/24/2014
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A doctor has provided 1 answer
A doctor has provided 1 answer
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