Vitamin D, 25-Hydroxy Blood Test
Vitamin D, 25-Hydroxy Blood Test (Labcorp)
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.
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. 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.
Vitamin D is often checked as part of a routine health screening. It can also be ordered when someone had signs of vitamin D deficiency which can include conditions affecting the bones such as Rickets or Osteoporosis.
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.
Note: Result turn around times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.
Fasting preferred, but not required
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