After The Test & Treatment Options
After the Test
Once your specimen is submitted, results are typically processed and available within a few business days. However, processing times may vary. When ready, your results will be delivered in a clear, easy-to-understand report. If any results suggest a potential infection, you’ll receive a call from an independent healthcare coordinator. Independent physicians are also available to answer any questions or discuss your results in detail.
Treatment Options
As part of your purchase, you have the opportunity to consult with an independent physician. If appropriate, they may be able to prescribe treatment based on your test results.
Age: 18+
Must be 18+ to order blood tests.
Collection Method
In person at a location
Test Details & What It Measures
Vitamin D (25-Hydroxyvitamin D) Test
A vitamin D test measures the level of vitamin D in your blood, which is essential for maintaining strong bones, a healthy immune system, and proper muscle function. Your body produces vitamin D when your skin is exposed to sunlight, but it can also be obtained through food and supplements. The most commonly measured form is 25-hydroxyvitamin D (25[OH]D), which provides a reliable indicator of overall vitamin D status.
Normal vitamin D levels are generally considered adequate when they fall between 30 and 50 ng/mL. Levels between 20–29 ng/mL are considered insufficient, and levels below 20 ng/mL indicate a deficiency. Levels above 100 ng/mL may suggest vitamin D toxicity and could pose health risks.
Low vitamin D levels are common and may cause symptoms such as fatigue, muscle weakness, bone pain, and increased susceptibility to infections. Long-term deficiency can lead to conditions like osteomalacia in adults or rickets in children. Your healthcare provider may recommend this test if you have limited sun exposure, are at risk for osteoporosis, or have conditions affecting vitamin D metabolism.
Citations
Holick, M. F., et al. (2011). Evaluation, treatment, and prevention of vitamin D deficiency: An Endocrine Society clinical practice guideline. The Journal of Clinical Endocrinology & Metabolism, 96(7), 1911–1930. https://doi.org/10.1210/jc.2011-0385
