I have a question about hair folicle drug testing?

can hair sample taken from a hair brush be tested and how long is that sample good for? The sample has been in baggie for about a year and a half... Thank you in advance

I have a question about hair folicle drug testing?

A standard hair follicle screen covers a period of approximately 90 days, but is susceptible to time variation depending on the growth rate of your hair. The hair sample is cut as close to the scalp as possible and the most recent 3.9cm (or 1.5 inches) are tested. It is possible to go back even further than 90 days since the time period is limited only by the length of the hair sample, but is standardized to a 90 day history.

I have a question about hair folicle drug testing?

The sample may have degarded a bit but the most important thing is that the sample can get a several month period depending on how long it is.....you do not need a root bulb on the folicle in order to test for drugs, only for a DNA test.

I have a question about hair folicle drug testing?

not unless it was frozen within 3 days. you yank a fresh hair and check it for weed. it will tell whether or not you smoked weed in the past 24 weeks