Jun 7, 2024 · Here, your body converts vitamin D to a chemical known as 25-hydroxyvitamin D, also called calcidiol. The 25-hydroxy vitamin D test is the best way to monitor vitamin D levels. …

VitD2 and VitD3 are subsequently 25-hydroxylated in the liver to 25-OH-VitD. 25-OH-VitD represents the main body reservoir and transport form of vitamin D, being stored in adipose …

A vitamin D test measures the amount of vitamin D in the blood. The vitamin D test is also called the 25-hydroxy vitamin D, or 25 (OH)D, test. Your body needs vitamin D to absorb calcium. …

Aug 4, 2025 · Vitamin D is a nutrient obtained via sun exposure, diet, and supplements, essential for various bodily functions. The body converts vitamin D into 25-hydroxyvitamin D (calcidiol), …

Dec 11, 2025 · A 25-hydroxyvitamin D test checks if your body has too much or too little vitamin D. The test involves a simple blood draw, and you don't need to fast beforehand.

Jul 16, 2020 · A 25-hydroxy vitamin D test measures how much vitamin D is in someone's blood. Learn what to expect, what the results mean, and how to boost vitamin D levels.

Vitamin D is not very water-soluble, so it must be delivered to and carried in the blood as a complex with vitamin D-binding protein. Once in the circulation, vitamin D is metabolized to 25 …

Indicates the status of NY State approval and if the test is orderable for NY State clients.

Learn more about Vitamin D Test test, including how it is performed, results, and what to expect during the test.

Oct 10, 2024 · The vitamin D level [25 (OH)D] in the blood is slightly low, and it is advisable to monitor this level in future blood tests. This may be due to low sunlight exposure or poor …