Vitamin D is both a nutrient you eat as well as a hormone that's produced by your skin in response to sunlight exposure. It plays a significant role in bone health by helping regulate calcium and phosphorus, which are essential minerals that work together to build strong bones. Vitamin D also has a role in your nerve, muscle and immune systems, as well as your mental health.
This vitamin D blood test evaluates 25-hydroxyvitamin D (25-D): the best measure of how much vitamin D is stored in your body. A prolonged deficiency in vitamin D has been shown to lead to fatigue, bone pain and even depression.
Discover your nutritional status with the Micronutrient Test. Measure essential vitamins and minerals like vitamin D, B12, folate, magnesium, iodine and zinc to get a bigger picture of your health.
Preparation: No special preparation is needed.
Labcorp OnDemand’s Vitamin D Test measures the level of 25-hydroxy vitamin D in your blood. Vitamin D helps your body regulate calcium metabolism which in turn helps maintain healthy bones, control infections, reduce inflammation and more. Your skin produces vitamin D through sunlight exposure. Vitamin D is also found in foods such as fatty fish, mushrooms, egg yolks and fortified milks. When you’re deficient in vitamin D, you may experience symptoms like fatigue, muscle weakness and depression. Additionally, you could become more prone to having fractures from falls if you have a vitamin D deficiency.
People who might be at risk of lower vitamin D levels may include¹:
People who might be at risk of lower vitamin D levels may include¹:
• Older adults
• Those with darker colored skin (more pigmentation)
• Those with certain conditions, such as liver diseases, cystic fibrosis and Crohn's disease
• Those who are obese or have had gastric bypass surgery
Vitamin D helps regulate calcium levels, which plays an important role in strengthening bones and preventing bone-weakening conditions such as osteoporosis.
It is possible to improve your vitamin D levels through nutrition, increased sunlight exposure and supplements.²
1. MedlinePlus. Vitamin D. MedlinePlus website. Updated September 23, 2021. Accessed November 15, 2022. https://www.medlineplus.gov/vitamind.html
2. National Institute of Health Office of Dietary Supplements. Vitamin D Fact Sheet for Health Professionals. National Institute of Health Office of Dietary Supplements website. Updated November 8, 2022. Accessed December 16, 2022. https://ods.od.nih.gov/factsheets/VitaminD-Consumer/
3. Cuomo A, Giordano N, Goracci A, et. al. Depression and Vitamin D Deficiency: Causality, Assessment, and Clinical Practice Implications. Neuropsychiatry. 2017;7(5):606-614. doi:10.4172/Neuropsychiatry.1000255
4. Cleveland Clinic. Vitamin D Deficiency. Cleveland Clinic website. Reviewed August 2, 2022. Accessed December 16, 2022. https://my.clevelandclinic.org/health/diseases/15050-vitamin-d-vitamin-d-deficiency
<p>1. MedlinePlus. Vitamin D. MedlinePlus website. Updated September 23, 2021. Accessed November 15, 2022. <a href="https://www.medlineplus.gov/vitamind.html" target="_blank" rel="noopener noreferrer">https://www.medlineplus.gov/vitamind.html</a></p> <p>2. National Institute of Health Office of Dietary Supplements. Vitamin D Fact Sheet for Health Professionals. National Institute of Health Office of Dietary Supplements website. Updated November 8, 2022. Accessed December 16, 2022. <a href="https://ods.od.nih.gov/factsheets/VitaminD-Consumer/" target="_blank" rel="noopener noreferrer">https://ods.od.nih.gov/factsheets/VitaminD-Consumer/</a></p> <p>3. Cuomo A, Giordano N, Goracci A, et. al. Depression and Vitamin D Deficiency: Causality, Assessment, and Clinical Practice Implications. <i>Neuropsychiatry</i>. 2017;7(5):606-614. doi:10.4172/Neuropsychiatry.1000255 </p> <p>4. Cleveland Clinic. Vitamin D Deficiency. Cleveland Clinic website. Reviewed August 2, 2022. Accessed December 16, 2022. <a href="https://my.clevelandclinic.org/health/diseases/15050-vitamin-d-vitamin-d-deficiency" target="_blank" rel="noopener noreferrer">https://my.clevelandclinic.org/health/diseases/15050-vitamin-d-vitamin-d-deficiency</a></p>
Simply purchase this test online. A healthcare provider will review and approve your test requests; no healthcare provider visit is required.
Visit a Labcorp location near you for sample collection. Visits may be scheduled online.
View your easy-to-read results online in your Labcorp Patient™ account, including Linked Accounts. For certain results that require prompt attention, you will also be contacted by phone or mail.
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