Can a hair follicle test go back 8 months?
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Can a hair follicle test go back 8 months?
When tested, each centimetre of hair therefore reflects one month’s history of drug use (or non-use). This is why hair strand testing is able to provide such a large window of detection, assessing drug use as far back as 6 months.
How many months does it take to pass a hair follicle test?
The hair follicle drug test can pick up drugs you used within the last 90 days. This is because hair grows about half an inch every month. So, in 3 months or 90 days, it may grow an inch and a half, which is the ideal length of hair required for a standard hair test.
Can a hair follicle test detect infrequent use?
Regular drug users may hate this. If an individual is an infrequent or first-time drug user, a hair follicle test may not detect drug use a few days before the test because it takes time for hair to grow. Employers need to weigh that fact into their choice of a drug test method.
Can a hair test go back 2 years?
A standard hair test will only test the first 1½ inches of hair. The hair is cut as close as possible to the scalp. Donors with longer hair can be tested as far back as one year provided the hair is long enough. This is called segmented hair testing.
How far back do hair follicle drug test?
How far back can a hair drug test detect drug use? Hair drug tests have the longest detection period, and can typically detect drug use for up to 90 days. Depending on the drugs used, a hair sample can sometimes help determine when drug use occurred and whether it’s been discontinued.
What is an infrequent user?
Detection period With respect to the three scenarios outlined, a person using an illegal drug once or twice over a weekend was considered an infrequent user, whereas the person using an illegal substance more than that over a weekend was considered to be a frequent user.
What will show up in a hair follicle test?
The most common type of hair follicle drug test is the 5-panel drug test. This test works to detect cocaine, opiates, PCP, THC, and amphetamines.