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Our information sheets are full of useful information on health issues like the early warning signs of heart disease and prostate cancer, as well as pregnancy, ovulation, drug testing and much more. Get yours free today!

How far back does hair drug testing go back for marijuana and cocaine?

The PDT-90 Hair drug test can detect back to 90 days. However this test should not be used to test for drugs taken 10-14 days prior to taking the test, as it is necessary to allow for the hair to grow.

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