Vitamin D! Make sure you are taking a good quality version of this daily as part of your winter wellness self care. a day for sure, more if you are sick. Ask someone on your wellness team for amounts specific to you.
Vitamin deficiency causes reversible megaloblastic anemia, demyelinating disease, or both. Current assays have insufficient sensitivity and specificity; methylmalonic acid levels are useful to confirm diagnosis. Parenteral or high-dose oral vitamin