This vitamin D test measures the amount of 25-hydroxyvitamin D in your blood. Your body absorbs vitamin D when exposed to sunlight or consuming fortified foods – storing it in fat cells until needed for use. Your liver and kidneys convert this inactive vitamin D to 25-hydroxyvitamin D, the active form the body needs. Vitamin D deficiency can indicate bone disease, nutrition disorders, or other metabolic complications.
No doctor’s visit needed
This test measures the amount of 25-hydroxyvitamin D, an indicator for the level of vitamin D in your body. Vitamin D is involved in regulating calcium and phosphorus, which are essential nutrients to promote bone strength and cellular health. Vitamin D can also help the immune system fight infections. Your body produces vitamin D after exposure to sunlight or from consuming certain foods and supplements.
Fasting (not eating or drinking anything except water) for 8-12 hours is recommended.
2-3 business days
Blood
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