Vitamin D Test
This vitamin D blood test measures the amount of 25-hydroxyvitamin D in your body. Vitamin D is a key nutrient that helps your body absorb calcium and phosphorus – both of which are essential to bone health. Read more
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.
Buy your own vitamin D lab test online with Quest®. No doctor’s visit is required – simply purchase vitamin D testing, visit a nearby Quest® location for sample collection, and get fast results.
How it works
questhealth.com offers 100+ consumer-initiated Quest Diagnostics lab tests to empower you to have more control over your health journey. Choose from a variety of test types that best suit your needs.
Foods that naturally contain Vitamin D:
• Fatty fish such as salmon, tuna, and mackerel
• Beef liver
• Cheese
• Mushrooms
• Egg yolks
Foods that may be fortified with Vitamin D:
• Milk
• Breakfast cereals
• Orange juice
• Other dairy products, such as yogurt
• Not enough Vitamin D in the diet
• Poor absorption of Vitamin D
• Inadequate exposure to sunlight
• Adults > 50 years of age
• People with darker skin (darker skin absorbs less sunlight)
• People who are overweight
• People who are vegan or have a diet low in Vitamin D–rich foods
• People with other health conditions such as Crohn disease, celiac disease, kidney disease, or liver disease