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This Vitamin D test has become more popular in recent years as the role of 25-hydroxy Vitamin D has been investigated and better understood. Traditionally, 25-hydroxy Vitamin D has been known to affect the body's absorption of calcium and thereby maintain bone and tissue health. Available from foods such as fish and eggs and also as a supplement, this particular Vitamin D test is the best way to get an indication of how adequate the body's Vitamin D stores are.
Traditionally, certain types of people are thought to be at an increased risk for having low Vitamin D levels. More specifically, people who are elderly or obese, people who have had gastrointestinal surgery, babies and people who live in areas with minimal sunlight have a higher likelihood of having low body stores that demonstrated a low Vitamin D blood test result.
More recent research has demonstrated that Vitamin D might play more important roles in maintaining health than previously imagined. A low Vitamin D test level might be associated with an increased risk of a heart attack, cancer, respiratory disorders and immune system dysfunction.