[nagrom]

Then again, there have been several studies [0] that show that many people in the northern hemisphere are deficient in vitamin D and that the deficiency could be the root of serious health problems.

[0] E.g. http://www.ncbi.nlm.nih.gov/pubmed/21310306

[Ras_]

True, for example half of Finns receive less than recommended amount of vitamin D. To combat this dairy and edible fat products have received vitamin D supplements since 2003. For example skimmed milk (the most popular one) would otherwise have very little D because it gets removed in the process along with fat. First you take it out, then put it back in...

[pavel_lishin]

My doctor tells me that I'm low on vitamin D every time I visit and have blood work done. I try to get more sun, but it's kind of hard in New York.