You might want to do a little bit of research on your misinformation.   Tell me how in Canada and other jurisdictions with high latitudes does one get enough sunlight when you are covered up 9 months of the year?

 In order to make one's daily dose of vitamin D in Toronto from June to September a Caucasian needs to have 60% of their skin exposed (with no sunscreen on) for 15 to 20 minutes.  Add in darker skin and the time lines are longer.

Have you checked the amount of vitamin D in milk?  It is 100 units per cup and the new recommendation for pregnant women is 4000 IU per day!  That's 36 cups of milk a day on top of the Materna multi-vit.

At Hospital for Sick kids now they are giving newborns 2000 units per day and control group 400 IU/day.  Many of those kids in the treatment are have vitamin D levels < 50 nmol/L.  

You need to update your hard drive.