There must be an epidemic of people walking around with low Vitamin D levels. I have talked to several people who have gotten blood tests and most of them have said that it revealed that they were low on Vitamin D.
A couple of the things I have added to my diet on a daily basis is Vitamin D3 and Green Pasture's Cinnamon Fermented Cod Liver Oil/Butter Oil Blend. Cod liver oil also contains natural vitamin D along with other great nutritional benefits. I take one rounded teaspoon of cod liver oil in the morning and 6,000 IU's of Vitamin D3 at night.
I think the best source of Vitamin D is the sun, and unfortunately in the winter we do not get enough sun. Maybe that's why there are more colds in the winter time.
The only way to know your Vitamin D level is to get a blood test. Here is a great post on Vitamin D from Dr. Mercola:
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