Vitamin D 25-Hydroxy Blood Test

Sample Report Test Code: 081950 Specimen Type: Blood

Description:

Vitamin D, 25-Hydroxy Blood Test (Labcorp)

What is a Vitamin D 25 Hydroxy Test?

This online Vitamin D 25-Hydroxy test is the most common method for measuring a person's vitamin D levels.  There are 2 forms of vitamin D, D2 and D3.  D3 typically makes up the majority of the vitamin D in your body.  It is produced when the body is exposed to sunlight.  D3 is also found in some foods including eggs and fatty fish, such as salmon, tuna, and mackerel.  D2 mainly comes from eating fortified foods including some types of cereal and dairy.  In the body, D2 and D3 are converted into 25 hydroxyvitamin D, aka 25(OH)D. A vitamin D blood test measures the level of 25(OH)D in your blood. Vitamin D is necessary for the proper growth and health of teeth and bones.  It also helps in the healthy development of the immune system as well as various tissues throughout the body.

What causes Vitamin D deficiency?

The most common source of Vitamin D deficiency is not getting enough sun exposure.  While malnutrition can contribute to a deficiency as well, the majority of people do not get sufficient vitamin D from their diet anyway. 

What are the symptoms of Vitamin D deficiency?

Someone suffering from a vitamin D deficiency may experience symptoms that include tiredness, weakness, aches and pains, and frequent infections.  Conditions such as Cystic Fibrosis and Crohn's Disease which interfere with the body's ability to absorb fat and fat-soluble vitamins can also cause vitamin D deficiency.

Why should I check my Vitamin D levels?

Vitamin D is often checked as part of a routine health screening.  It can also be ordered when someone has signs of vitamin D deficiency which can include conditions affecting the bones such as Rickets or Osteoporosis.   

Vitamin D is also included in a number of packages such as our Nutritional Deficiency Panel and Comprehensive Vitamin Panel.  Please see our Nutrition testing category for more options.

How long does a Vitamin D test take?

Turnaround time for this Vitamin D blood test is typically 1-3 business days.

Where can I find a Vitamin D, 25-Hydroxy Test?

Check our lab finder to locate a collection site in your area.