For cytochrome P450 tests, a sample of your DNA is taken for lab testing. It can be retrieved in one of two ways:
- Blood test. Blood is drawn from a vein in your arm.
- Cheek swab. A cotton swab is rubbed inside your cheek to get a skin cell sample.
After the procedure
Getting a cheek swab or having a blood sample drawn should take just a few minutes. Whichever type of test you have, your sample will be sent to a lab where your DNA is analyzed for specific genes.
Sept. 07, 2012
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