The most common cause of low vitamin d levels in a person's body is the lack of sunlight they are getting. Believe it or not, people in Chicago during the winter have extremely low levels of vitamin d because of the non-existing sunlight.
Low vitamin D levels can be caused by lack of sunlight. We require at least 20 minutes per day to soak up the sun's rays. These days, most people stay indoors.
If you shun the sun, suffer from milk allergies, or adhere to a strict vegan diet, you may be at risk for vitamin D deficiency. Known as the sunshine vitamin, vitamin D is produced by the body in response to skin being exposed to sunlight. It is also occurs naturally in a few foods -- including some fish, fish liver oils, and egg yolks -- and in fortified dairy and grain products.
Vitamin D is essential for strong bones, because it helps the body use calcium from the diet. Traditionally, vitamin D deficiency has been associated with rickets, a disease in which the bone tissue doesn't properly mineralize, leading to soft bones and skeletal deformities. But increasingly, research is revealing the importance of vitamin D in protecting against a host of health problems.
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