Calcifediol

Calcifediol is a prehormone form of vitamin D3. It is also known as 25-hydroxyvitamin D3 and is produced in the liver from vitamin D3 after it is metabolized. Calcifediol is often used as a biomarker to determine a person's vitamin D status, as it is the most commonly measured form of vitamin D in blood tests. It can also be used therapeutically to treat vitamin D deficiency and related conditions.