Vitamin D is one of those crucial vitamins that everyone needs. Deficiencies in this vitamin have been linked to cancer, heart disease, asthma, and osteoporosis. But don’t you get vitamin D from the sun? Can’t you just go out into the sun and get a dose of vitamin D everyday?

Well, it’s not that easy. In fact, it’s estimated that one billion people worldwide are deficient in this critical nutrient.

There are many reasons that you may be deficient in Vitamin D:

Sunscreen- We have become a sun screened obsessed culture. With that obsession has come a consequence to our health. Sunscreen not only blocks out harmful rays from the sun, it also inhibits the body’s ability to absorb Vitamin D by 90%.
Age- As people age, their bodies become less efficient at producing vitamin D. It is also thought that older people have a tendency to stay inside more which is why seniors in US and Europe have vitamin D deficiency rates ranging from 20%-100%.
Obesity- Unfortunately the more weight you hold onto, the more likely you are to have a vitamin D deficiency. A study in the American Clinical Journal of Clinical Nutrition concluded that there is a strong link between obesity and vitamin D insufficiency. Researchers believe vitamin D deficiency is due to the vitamin being stored in the fatty tissues and not being able to reach the bloodstream.
Seasons- Because of the angle of the sun, your vitamin D levels can decrease by 50% in the winter months.
Exposure to the sun- Ok, this seems like an obvious one. But did you know that in order to get the amount of vitamin D your body needs you need to be in the sun everyday, mid day, with over 50% of your skin exposed for over two hours. Not very many people do this. In my opinion, this is one of the top reasons so many people have a Vitamin D deficiency.
Diet- Vegans are at the greatest risk for vitamin D deficiencies. Food sources such as fish, eggs, cheese, milk, beef, and liver are all packed with vitamin D.