Hair Follicle Drug Test

Overview

Hair follicle drug testing provides a 90-day history of drug use by analyzing a 1.5-inch hair sample. It is the preferred method for detecting chronic drug use patterns and is increasingly used by employers for pre-employment screening.

Who Should Get This Test?

Pre-employment screening (especially for safety-sensitive positions)
Child custody cases requiring long-term monitoring
Court-ordered testing
Federal government positions
Workplace accidents investigations

What It Detects

Hair tests can detect: Marijuana (THC), Cocaine, Opiates (codeine, morphine, heroin, oxycodone, hydrocodone), Amphetamines/Methamphetamine, Phencyclidine (PCP), and Extended opiate panels.

Detection Window

Detection Window: 90 days (approximately 3 months) based on standard 1.5-inch hair sample. Hair grows at approximately 0.5 inches per month.

How to Prepare

Hair must be at least 0.5 inches long on head
Body hair can be used if head hair is insufficient
Avoid bleaching or chemical treatments before test
Bring valid photo ID

Frequently Asked Questions

Can I beat a hair drug test by shaving my head?

Shaving your head will not help. Labs can use body hair (armpit, chest, leg) if head hair is unavailable. Attempting to avoid testing may be reported as a refusal.

Does hair color affect test results?

No, hair color does not affect the accuracy of drug testing. The test analyzes the drug molecules within the hair shaft, not the pigment.

Can secondhand smoke cause a positive hair test?

Secondhand smoke is unlikely to cause a positive hair test. The levels required to trigger a positive result indicate direct use, not environmental exposure.

Cost & Pricing

The Hair Follicle Drug Test typically costs between $125 and $249 when ordered directly through a certified lab. Prices may vary by location.

Disclaimer: This information is for educational purposes only and should not replace professional advice. Always consult with your employer, legal representative, or healthcare provider regarding specific testing requirements. This site contains affiliate links; we may be compensated when you order through them at no extra cost to you.