Smart Labs Now Logo

¡Hablamos Español!

Hair Follicle Drug Test: Process & Accuracy

Hair Drug Testing Guide

Drug testing is a cornerstone of workplace safety, legal compliance, and personal accountability. Among the various methods available, the hair follicle drug test stands out for its extended detection window, accuracy, and tamper resistance.

This article breaks down the test’s process, accuracy, and advantages while addressing common concerns

If you want to quickly sign up for hair drug testing in Portland – for either personal or organizational screenings – please apply here 🙂: 

Test Accuracy

Hair follicle test accuracy

Hair follicle drug testing is highly regarded for its ability to detect drug use over a longer period—typically up to 90 days. The method is underpinned by advanced screening technologies such as LC-MS/MS (Liquid Chromatography-Mass Spectrometry), which ensure reliable results by identifying drug compounds and their metabolites with precision.

Factors Affecting Accuracy:

  • Drug Metabolites: These are byproducts of drugs processed by the body. Their presence in hair provides concrete evidence of drug use.
  • Two-Step Testing Process: An initial enzyme-linked immunosorbent assay (ELISA) test screens for substances, and positive results are confirmed using gas chromatography-mass spectrometry (GC-MS) for utmost accuracy.
  • Hair Growth Rates: Hair grows at an average rate of 0.5 inches per month, meaning a 1.5-inch sample can reflect approximately 90 days of history.
  • Self-Reported Drug Use: Discrepancies between test results and self-reports may indicate either sporadic use or a lack of user awareness about drug intake through prescription medications.
  • Bleaching or Coloring: Cosmetic treatments like dyeing and bleaching can reduce the detectability of drug metabolites but typically do not eliminate them entirely.
  • Melanin Content: Higher melanin levels can increase the binding of certain drug compounds to hair, slightly influencing detection rates.
  • False-Positive Results: Rarely, environmental contamination or prescription drugs may mimic drug metabolites.
  • Repeated Drug Use: Chronic users are more likely to yield positive results due to accumulated metabolites in their hair.

Although highly accurate, no test is perfect. For critical applications, combining multiple testing methods enhances reliability.

Test Procedure

A clump of human hair.

Conducting a hair follicle drug test involves meticulous steps to ensure reliable outcomes. Here’s a closer look at the process:

  • Hair Sample Collection: A small strand of hair, typically from the scalp, is cut near the root to capture the most recent drug use history. Body hair may also be used if head hair is unavailable.
  • Secure Handling: Samples are sealed in a secure envelope to prevent contamination during transit.
  • Laboratory Testing: Labs use advanced tools such as enzyme-linked immunosorbent assay (ELISA) for initial screening and confirmatory GC-MS analysis for accurate results.
  • Environmental Contamination Mitigation: Measures like washing hair samples eliminate external contaminants like smoke or scalp sweat.
  • Overnight Testing: Many labs offer rapid turnaround times, delivering results within 24-48 hours.

Errors like improper collection or mishandling can affect outcomes, emphasizing the need for professional administration.

Test Results Interpretation

Drug test results.

Interpreting hair follicle drug test results is straightforward:

  • Positive Results: Indicate drug use, with specifics about the type of substance, such as amphetamine, marijuana metabolite, cocaine metabolites, opiates, or phencyclidine (PCP).
  • Negative Results: Confirm no detectable drug use in the tested period.
  • Inconclusive Results: Occur due to contamination, insufficient sample size, or technical errors.

A Medical Review Officer (MRO) reviews positive results, considering factors like prescription drug use to rule out false positives. Substances like cocaine metabolites or marijuana metabolites typically signal illicit drug use, while substances detected in legal medications may require further clarification.

Test Cost

Hair follicle drug test cost.

Hair follicle drug testing costs vary based on factors like testing methods, scope, and provider.

Cost Breakdown:

  • Flat Fee for Basic Panels: Covers standard substances like THC and amphetamines.
  • Expanded Opiates Testing: Costs slightly more but provides a broader analysis.
  • Shipping Costs: Include secure delivery of samples to the laboratory.
  • Employer Costs: Bulk testing often reduces per-person expenses for corporate clients.
  • Health Insurance Coverage: Most insurers do not cover hair follicle tests unless performed for medical purposes.

Compared to urine tests, hair tests are pricier but offer significantly longer detection windows and greater reliability.

For exact individual hair drug test pricing or custom business quotes, please call us ☎ at (503) 477-7748.

Comparison with Urine Tests

Urine and other drug test samples.

Hair follicle and urine drug tests serve different purposes, each with its pros and cons.

Key Differences:

  • Detection Window: Hair tests detect up to 90 days of use, while urine tests are limited to recent use (1-7 days).
  • Tamper Resistance: Hair tests are less susceptible to adulteration than urine samples.
  • Cost Comparison: Urine tests are cheaper but require repeated testing for long-term monitoring.
  • Corporate Testing: Hair tests are preferred for roles requiring consistent sobriety, such as those in educational institutions or legal testing scenarios.
  • Certifications & Cutoff Levels: Both tests follow strict regulatory standards to ensure accuracy and fairness.

A complementary approach—using both methods—often yields the best outcomes for comprehensive drug screening.

Alternative Testing for Bald Individuals

A bald person.

What happens if someone lacks head hair? Options abound:

  • Body Hair: Armpit, chest, or leg hair provides a viable alternative.
  • Facial Hair: Beard and mustache hair can be used.
  • Shaved Bodies: Blood-based biomarker testing or alternative specimen collection methods like saliva tests may be required.
  • Usable Sample: The type and length of hair influence the detection window, but all hair types retain drug metabolites similarly.

Innovative methods ensure that even individuals without scalp hair can undergo accurate testing.

Home Testing Options

A lock of human hair.

At-home hair follicle testing kits offer convenience but come with several limitations.

Features of At-Home Kits:

  • 90-Day Drug Use History: Matches lab-based tests in detection capability.
  • Instruction Manual: Guides users through sample collection and submission.
  • Pre-Paid Envelope: Ensures secure sample transit to the laboratory.
  • Unique Identification Number: Maintains confidentiality and tracks results online.
  • Expanded Opiate Panels: Available from many online retailers.

However, home kits lack the robustness of professional testing and often require additional lab confirmation, increasing costs over time.

Myths and Misconceptions

Facts vs Myths.

Hair follicle drug testing is often surrounded by myths, particularly among individuals attempting to avoid detection. However, the gold standard nature of this testing method ensures reliability, even when these misconceptions persist. Let’s debunk some of the most common myths.

Myth 1: Shaving Your Head Can Beat the Test

One prevalent myth is that shaving your head will prevent the test from being conducted. However, the absence of head hair doesn’t invalidate the test. Body hair, such as from the arms, legs, or chest, can be collected as an alternative, and it provides a similar detection window for drug metabolites.

Myth 2: Using Regular Shampoos Removes Drug Traces

While excessive shampooing or using “detox shampoos” is often touted as a method to cleanse hair, these products are largely ineffective against the drug metabolites embedded in the hair shaft. Hair follicle drug testing analyzes the inner structure of the hair, which remains unaffected by surface-level cosmetic treatments or excessive shampooing.

Myth 3: Chemically Washing Hair Eliminates Evidence

Some individuals believe that chemically washing or treating hair with thermal straighteners can erase drug traces. While these processes may reduce the concentration of metabolites, they rarely remove them entirely. Persistent drug misusers will still likely test positive, as modern testing methods can account for cosmetic alterations.

Myth 4: False Positives Are Common

Another misconception is that false positive results are frequent in hair follicle drug tests. In reality, advanced testing processes, including confirmatory analysis through gas chromatography-mass spectrometry (GC-MS), minimize the likelihood of false positives. Misinterpreted results are often due to a lack of understanding about prescription medications or environmental contaminants rather than testing errors.

Myth 5: Bald Individuals Cannot Be Tested

Some assume that being bald makes hair testing impossible. This is incorrect, as already discussed—labs can analyze alternative samples like body hair, which retains drug metabolites similarly to head hair. For those without usable hair, other methods, such as blood or urine testing, can be employed.

In reality, hair follicle drug test remains a reliable, tamper-resistant tool for detecting drug use.

Smart Labs Now: Your Partner in Hair Follicle Drug Testing 🤝

Smart Labs Facility Logo

Smart Labs Now delivers reliable, affordable, highly accredited, and gentle drug testing solutions tailored for both individuals and organizations in Portland, OR.

Why Choose Us?

  • Comprehensive Testing: From pre-employment screening to personal tests.
  • Convenient Locations: Visit our labs or schedule on-site testing at your address.
  • Quick Results: Our streamlined processes ensure rapid turnaround times.

Accuracy and Confidentiality

At Smart Labs Now, we prioritize both precision and privacy in our hair follicle drug testing services. This dual focus ensures that every test result is as reliable as it is discreet, enabling individuals and organizations to make informed decisions with confidence.

Advanced Testing Methods

Our state-of-the-art facilities employ cutting-edge technologies to deliver highly accurate results. Using advanced hair follicle drug testing methods, we analyze samples to detect drug use in detail, leaving no room for ambiguity. The rigorous testing process minimizes errors, providing dependable outcomes that meet industry standards.

Measures to Protect Privacy

We understand the sensitive nature of drug testing and have implemented strict protocols to maintain privacy and discretion:

  • Strict Confidentiality: Personal data and test results are accessible only to authorized individuals.
  • Secure Delivery: Samples are handled and transported securely to prevent tampering or loss.
  • Confidential Results: Results are delivered in a way that respects individual privacy, whether for personal or organizational purposes.

Professionalism You Can Trust

Our experienced professionals manage every aspect of the testing process with utmost care and professionalism. From sample collection to result reporting, our staff ensures the experience is smooth, secure, and confidential.

Empowering Informed Decisions

By delivering accurate and private results, we empower clients to make informed decisions—whether they involve workplace compliance, legal matters, or personal accountability.

When you choose Smart Labs Now, you’re not just getting a test; you’re getting peace of mind backed by precision and trust 😃👋.


Please consult your primary care physician before engaging with any pharmaceutical, natural substances, or activity regimens mentioned or prescribed in this post. Smart Labs Now is not responsible for health or life outcomes based on the information or recommendations provided. This account does not serve as a substitute for professional medical advice/help.

    Comments are closed