Vitamin D

Information
What is a Vitamin D Test?
A Vitamin D Test is a blood test that measures how much vitamin D is in your body. Since vitamin D deficiency has been linked to an increased susceptibility for diseases such as high blood pressure, poor circulation, cancer, type 1 diabetes, Periodontal disease, Multiple Sclerosis, Parkinson’s disease, and Seasonal Affective Disorder (SAD) among others, there has been an increased interest in deficiency which has led to continued research and a focus on educating people about the frequency and severity of vitamin D deficiency.

The Vitamin D Test is part of our Essential Plus Screening Panel.
Testing
Why should I get tested?
A Vitamin D deficiency can lead to bone softening diseases including Rickets, Osteomalacia, and Osteoporosis.

If you are having muscle weakness or dull aching pain in the spine, pelvis, and/or legs that persists or becomes severe you may want to consider a Vitamin D Test. If you are having symptoms such as constipation, decreased appetite (anorexia), dehydration, fatigue, irritability, or vomiting, it may be a sign of Vitamin D toxicity and you might want to consider getting a Vitamin D Test.

You might also want to consider the Vitamin D Test if you want to monitor your nutritional status or to check if vitamin D supplementation is working.

How should I prepare for the test?
Avoid food for four hours before your Vitamin D test.

Results
What could my screening results mean?
Low levels of vitamin D suggest a vitamin D deficiency. Possible causes of deficiency are little to no exposure to sunlight, lack of adequate vitamin D in the diet, impaired absorption of vitamin D, liver and kidney diseases, and use of certain medicines, including phenytoin, phenobarbital, and rifampinHigh levels of vitamin D are associated with hypervitaminosis D, and can occur after taking excessive doses of vitamin D. Excess vitamin D causes abnormally high levels of calcium in the blood, which can severely damage the bones, soft tissues, and kidneys.

If your Vitamin D Test indicates abnormalities, you should consult your healthcare provider for further analysis.