Vitamin D Blood Test

Sample Type:
Sample Type
Age: 18+
Collection Method: Visit a Labcorp Location
HSA/FSA Accepted
Short Description

Are you getting enough of nature’s sunshine vitamin? Let’s find out.


Vitamin D is both a nutrient you eat as well as a hormone that is produced in your skin in response to sunlight; it plays a significant role in bone health because it helps regulate calcium and phosphorus— two essential minerals that work together to build strong bones.

This 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 can pose health risks. Vitamin D occurs naturally in very few foods so most people cannot get sufficient vitamin D through nutrition alone. If vitamin D levels are low, vitamin supplementation may be helpful, especially when access to natural sunlight is limited.




No special preparation.

Why Consider This Test

Old Age
At Risk of Deficiency

People who might need extra vitamin D include:1

•  Seniors
•  People with dark skin
•  People with certain conditions, such as liver diseases, cystic fibrosis, and Crohn's disease
•  People who have obesity or have had gastric bypass surgery

Bone Health

Vitamin D helps regulate the calcium levels in our bodies, which plays an important role in strengthening bones and preventing bone-weakening conditions, such as osteoporosis.

Proactive Prevention

It is possible to improve your vitamin D levels through nutrition, increased sunlight exposure, and supplements.2


  1. “Vitamin D.” MedlinePlus, U.S. National Library of Medicine, 29 Jan. 2019, https://www.medlineplus.gov/vitamind.html
  2. “Office of Dietary Supplements - Vitamin D.” NIH Office of Dietary Supplements, U.S. Department https://ods.od.nih.gov/factsheets/VitaminD-HealthProfessional/

Packages With This Test

Vitamin Deficiency Blood Test:

Are you getting enough of these essential vitamins? Let’s find out.

How To Get This Test

Choose Your Tests
1. Choose Your Tests

Shop for tests and pay online. An independent physician will review and approve your test requests; no doctor’s visit is required.



Provide Your Sample
2. Provide Your Sample

Take the requisition number we emailed you, along with a photo ID, to a Labcorp location for sample collection.




Access Your Results Online
3. Access Your Results Online

View your easy-to-read results online in your OnDemand or Labcorp PatientTM accounts, including Linked Accounts (click here for more details). For certain results that require prompt attention, you will be also be contacted by PWN health via phone or mail.