What is the longest a hair follicle test can detect?

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.

How long does it take to pass a hair drug test?

A human hair can store a longer history compared to urine and blood, where the drug is flushed from the system in a matter of weeks. Through a hair follicle test, THC metabolites can be detected for as long as 90 days. This means that you need to at least the ways on how to pass hair drug test.

Can you get a drug test with no hair?

You would need to have absolutely no hair at all in order to make a hair follicle drug test impossible to conduct. People sometimes think that having short hair will make it impossible to get tested, but only two inches are needed. (However, the longer the hair sample collected, the longer the detection window.)

What happens if you fail a hair follicle drug test?

You have failed to provide a sample and whatever consequences follow from that, such as loss of job or retraction of an employment offer, are considered to be the result of you not volunteering a sample. So, as you can see, shaving your head to pass a hair follicle drug test is not a very effective method.

Is it possible to pass a hair follicle test?

It is one of the most popular methods of testing for companies because of its high level of accuracy. This means it’s pretty hard for you to pass a marijuana drug test. While most companies test with blood and urine samples to check for recent drug use, the hair follicle test is able to detect long-term drug use.

Can you pass a drug test if you have no hair on your head?

Mandatory means that you must submit a sample. Period. No exceptions. If you have no hair on your head, they will collect a hair sample from another part of your body. Oh, did the people who recommended shaving your head to pass a hair follicle drug test forget that you have other hair?

Can a shampoo help you pass a drug test?

Special hair products on the market — like shampoos — will claim to help you pass a drug test by cleansing your hair and hair follicles of any substances you’ve used. However, this claim is 100% false. It helps to understand how this type of drug testing works in the first place.

Can you refuse a hair follicle drug test?

You could refuse to submit a sample and let them fire you. That is your choice which is why it is considered voluntary. Same goes for pre-employment drug testing. The employer is telling you that as a condition of their job offer, you must submit to a hair follicle drug test.