Having blood tests to measure the amount of vitamin D in your blood is the only way to know if you’re getting enough vitamin D or not. The blood test you need is called a 25(OH)D blood test.
You can get a blood test at your doctors or you can do an in-home test or get a test at a laboratory. All of these methods of testing should give you accurate results.
In-home tests are easy to use and involve pricking your finger to take a small blood sample and sending this away to a laboratory for testing.
Your tests results will show whether you’re getting enough vitamin D or not, and whether you may need to take supplements or expose your skin to the sun more.
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There are three ways to get tested:
1.Ask your doctor for a vitamin D test.
Be specific and ask for a 25(OH)D test. There is another type of blood test for vitamin D, called a 1,25(OH)₂D test, but the 25(OH)D test is the only one that will tell you whether you’re getting enough vitamin D.
If your health insurance covers a 25(OH)D test, this is a good way to work with your doctor to get tested.
2.Order an in-home test.
These tests are sent to your home. You prick your finger and put a drop of blood on to some blotter paper. You send the paper to a laboratory to be tested.
These are an alternative if you don’t want to go to your doctor just for a vitamin D test, or if your insurance doesn’t cover a test.
3.Order a test online and get blood work done at a laboratory.
There are a few websites that allow you to bypass your doctor and go straight to the testing laboratory. These websites include mymedlab.com, healthcheckusa.com and privatemdlabs.com.
You can buy a 25(OH)D test from all of these companies and have the test itself done at your nearest LabCorp. These tests are a little more expensive than in-home tests.
All three ways of getting tested should give you an accurate result.
If you tested low and want a higher level, you need to get more sun exposure or take a larger daily supplement.
If you tested and are right where you want to be, continue your supplement and sun exposure routine. Keep in mind that your level in the summer is probably higher than in the winter, with more sun and UVB.
So you may need to supplement more in the winter than in the summer to have the same vitamin D level.
If you tested high and want a lower level, you need to take a smaller daily supplement.
The normal range of vitamin D is measured as nanograms per milliliter (ng/mL).
Many experts recommend a level between 20 and 40 ng/mL. Others recommend a level between 30 and 50 ng/mL.
You do not want to have a level over 100 ng/ml and in fact anything over 150 ng/ml is considered toxic.
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