Vitamin d3 test price

Vitamin D is a generic designation for a group of fat-soluble, structurally similar sterols, which act as hormones. This test is the preferred initial test for assessing vitamin D status and most accurately reflects the body's vitamin D stores. In the presence of renal disease, testing 1,25-dihydroxyvitamin D (DHVD) levels might be needed to adequately assess vitamin D status. DHVD testing alone may not clearly indicate deficiencies of vitamin D stores. Vitamin D compounds in the body are exogenously derived by dietary means; from plants as 25-hydroxyvitamin D2 (ergocalciferol or calciferol) or from animal products as 25-hydroxyvitamin D3 (cholecalciferol or calcidiol). Vitamin D may also be endogenously derived by conversion of 7-dihydrocholesterol to 25-hydroxyvitamin D3 in the skin upon ultraviolet exposure. 25HDN is subsequently formed by hydroxylation ( CYP2R1) in the liver. 25HDN is a prohormone that represents the main reservoir and transport form of vitamin D, being stored in adipose tissue and tightly bound by a transport protein while in circulation. Biological activity is expressed in the form of DHVD, the active metabolite of 25HDN. 1-Alpha-hydroxylation ( CYP27B1) occurs on demand, primarily in the kidneys, under the control of parathyroid hormone (PTH) before expressing biological activity. Like other steroid hormones, DHVD binds to a nuclear receptor, influencing gene transcription patterns in target organs. 25HDN may also be converted into the inactive meta...

• Best affordable: • Best for medical support: • Best for fast delivery: Vitamin D, also known as “the sunshine vitamin,” is a According to a 2018 study that analyzed national health data from 2001 to 2010, 28.9% of people in the United States have a vitamin D deficiency, 40.1% have insufficient vitamin D, and fewer than 30% have enough vitamin D to maintain optimal health. Globally, it is estimated about Thankfully, testing your vitamin D levels is relatively easy. Keep reading to learn about four of the best at-home vitamin D tests. They can help you find fast, easy, and accurate answers to whether your vitamin D is in the recommended range ( We considered the following factors when determining which products should make our list: • Company reputation: We selected tests that reputable companies offered. Furthermore, our internal vetting team thoroughly vetted each company based on its business practices. • Lab certification: All the tests below are processed in • Test methodology: During vetting, Healthline’s medical experts reviewed the methodology behind each test to ensure it’s based on sound science. • Customer reviews: We chose tests that have mostly positive online ratings and paid close attention to mentions of overall value and ease of use. • Price: $49 • Insurance coverage: Everlywell doesn’t accept insurance, but they do accept payments from a health savings account (HSA) or flexible savings account (FSA). • Results: within 5 days In addition to being among the...

4 - 10 days Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary. The biological function of vitamin D is to maintain normal levels of calcium and phosphorus absorption. 25-Hydroxy vitamin D is the storage form of vitamin D. Vitamin D assists in maintaining bone health by facilitating calcium absorption. Vitamin D deficiency can also cause osteomalacia, which frequently affects elderly patients. Vitamin D from sunshine on the skin or from dietary intake is converted predominantly by the liver into 25-hydroxy vitamin D, which has a long half-life and is stored in the adipose tissue. The metabolically active form of vitamin D, 1,25-di-hydroxy vitamin D, which has a short life, is then synthesized in the kidney as needed from circulating 25-hydroxy vitamin D. The reference interval of greater than 30 ng/mL is a target value established by the Endocrine Society. 2 1. Centers for Disease Control and Prevention (CDC). Laboratory Quality Assurance and Standardization Programs. Standardization of Measurement Procedures. Vitamin D Standardization Certification Program (VDSCP). Atlanta, Ga: CDC;2015. Available at: http://www.cdc.gov/labstandards/hs_standardization.html. Accessed April 12, 2015. Order Code Order Code Name Order Loinc Result Code R...

Values of vitamin D vary with exposure to sunlight. The assay measures other vitamin D metabolites, including dihydroxylated metabolites such as 24,25, 25,26, and 1,25 dihydroxy vitamin D; however, since the physiological concentrations of these metabolites are insignificant compared to those of 25-hydroxy vitamin D, the accuracy in assessing vitamin D levels is not compromised. Immunochemiluminometric assay (ICMA). This assay is performed on the DiaSorin LIAISON® instrument in multiple laboratories throughout LabCorp. This highly automated test measures both D 2 and D 3 together and reports a total 25-hydroxy vitamin D. Major clinical studies, including (but not limited to) the Centers for Disease Control (CDC) National Health and Nutrition Examination Survey (NHANES) data base, the Women's Health Initiative (WHI) Studies, and the Harvard-Based Health Professionals Studies, employed DiaSorin reagents. The majority of 25-OH vitamin D (25-D) in the circulation is derived from the conversion of 7-dehydrocholesterol in the skin that is irradiated with ultraviolet radiation in the UVB range (wavelength 290 nm to 315 nm). 1-5 The extent of vitamin D formation is not tightly controlled and depends primarily on the duration and intensity of the UV irradiation. Levels produced typically reach a plateau within 30 minutes of exposure. Unfortunately, use of a sunscreen with SPF as low as 15 reduces the rate of vitamin D production by 99.9%. Overproduction of vitamin D in the skin is ...