How fresh does hair have to be for a drug test?
Hair Follicle Drug Test Detection Times
Urine can only unearth THC for 3 – 30 days, depending on use frequency. Hair follicles, on the other hand, can analyse marijuana use for up to 90 days. That's right; your hair can still give away your cannabis use three months since your last smoke.
Can a hair drug test detect 1 time use?
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. This test could be a reprieve for a sporadic or one-time user, however.
What can a hair follicle test for?
A hair follicle drug test is used to screen for the abuse of prescription drugs, alcohol, or illegal substances such as cocaine. While blood or urine tests are typically more commonly used when testing for drugs, the hair follicle test has garnered some popularity in recent years.