Vitamin D Test

What is A Vitamin D Test?

A vitamin D test is a blood test that measures the amount of vitamin D in your body. Vitamin D is a very important nutrient that your body needs to stay healthy. It helps to absorb calcium and build strong bones. Low levels of vitamin D can cause a variety of health problems.

Preparation for Vitamin D Test

No preparation is required for a vitamin D test, as it is typically done as part of a routine physical exam or blood test.

Types of Vitamin D Test

The two main types of vitamin D tests are:

  • Vitamin D-25 hydroxy test- This measures the level of the main type of vitamin D, which is called 25-hydroxyvitamin D.
  • Vitamin D-1,25 dihydroxy test- This measures the level of a lesser-known type of vitamin D, which is called 1,25-dihydroxyvitamin D. This test is typically only used to evaluate people who have certain disorders that involve the bones or kidneys.

Why Get A Vitamin D Test?

Your doctor may order a vitamin D test if they suspect you have low levels of this important nutrient. Low levels of vitamin D can cause a wide range of health problems, including weak bones, muscle strength, and a weakened immune system. People who are at a higher risk for low vitamin D levels include those who are:

  • Older than 65
  • Obese
  • Have darker skin
  • Spend a lot of time indoors
  • Live in northern climates
  • Take medications that interfere with vitamin D absorption

When to Get Tested?

If you have any of the risk factors listed above, your doctor may recommend that you get a vitamin D test to check your levels. Additionally, if you are experiencing symptoms such as frequent infections, muscle weakness, or bone pain, your doctor may recommend a vitamin D test.

Risks of Vitamin D Test

Vitamin D tests are generally considered safe, with no known risks associated with them.