Hair Drug Test in Texas

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Hair drug testing is extremely accurate as hair growth is fed by the bloodstream. Drug molecules are deposited in the blood when used, the bloodstream simply creates a fingerprint of drug use right within the hair shaft (or hair follicle). This history of drug use grows out with the strands of hair, and stays in the hair as long as the hair is present; telling a comprehensive story of what types of drugs have been present in the body. By testing the drug molecules inside the hair shaft, we eliminate many external contaminants that can cause false positive test results.

Hair drug testing is similar to fingernail drug testing, in that the hair follicles are composed of hard protein called keratin. Also like hair drug testing, fingernail test is also a historically accurate way of testing for drug usage. Find out more about fingernail drug testing here.

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In a typical hair drug test (taken from the scalp), with the hair sample being at least 1.5 inches in length using 90-120 strands (60 mg) of hair, a hair drug test can identify drug use within a 90 day period. If body hair is used as the sample, the time frame of detection can cover a time frame of up to 1 year of drug use because the growth pattern of body hair is slower than hair from the scalp. The longer the hair the further back the drug detection time frame can go. In fact, when you ingest drugs, it goes into the hair follicle, and then into the strands themselves. Call our Houston hair testing experts to find out more.

Since It takes 7-10 days for hair to grow above the scalp, drug use within or shortly before that time frame cannot be detected by using the hair drug testing method. To obtain a full view of drug use (both recent and historical), and in an effort to be thorough, Quicktest Labs recommends ordering a urine screen in addition to the hair drug test. A urine drug test combined with a hair drug test is the most effective way to provide the most accurate test results possible. Call our Houston hair test lab for a full explanation of the benefits of pairing hair test along with a urine test and we will be happy to answer all of your questions!

After finding an obscure section of hair, and using approximately 90-120 strands of hair, (depending on the thickness of hair), we cut at least 1½ inches of hair as close to the scalp as possible. The hair is then run through a chemical solution to rid the hair of all external chemicals and contaminants. After the hair is decontaminated, it is then liquefied and tested for drug usage.

Fastest Labs of Houston can have the results of your hair drug test (commonly known as a "hair follicle test") in as little as 24 hours, however if a positive test result is found (drug use is detected) in the initial screening, the sample is automatically re-evaluated and re-tested for confirmation of the positive result, which can take an additional 3 to 5 days. The confirmation test is designed to eliminate all false-positives (detections which upon a more intense evaluation return as negative result). If a positive result is returned, Fastest Labs confirms the positive results by GC/MS (Gas chromatography- mass spectrometry). GC/MS is the method used to identify the actual drug or substance found within the test sample.

There is presently no reliable method for cheating a hair drug test; despite what many products, kits and retailers promise. Since the drug molecules reside deep within the hair shaft (which is why it is called a “Hair Follicle Test”), hair test results cannot be altered or falsified with external alterations such as chemicals, bleach, hair coloring dyes or special shampoos. Tampering with the hair specimen during collection is also nearly impossible as the hair sample must be cut directly from the individual.

One way individuals try to cheat a hair drug test is by shaving their hair off or cutting it short. When this happens, we simply collect the hair sample from another part of the individual’s body; such as their leg hair, arm hair, or other areas. If the employer has a solid drug testing policy in place and prefers not to invasively collect body hair, a shaved head or abnormally short hair, can result in a failed drug test completely. This is why it is so important for employers to implement a solid drug testing policy with Fastest Labs before drugs are suspected or before other problems arise.

The difficulty that individuals have in cheating a hair test coupled with the historically accurate drug use results a hair drug test provides is why employers, individuals, and parents choose a hair drug test over some of the other drug testing methods available at our labs.

For good reasons, hair drug testing is quickly becoming the preferred method of drug testing. In research studies that have compared the two testing methods (a urine drug test compared to a hair drug test) it was concluded that the hair drug testing method identified a significantly higher number of drug users over the urine drug testing method; even 4 to 8 times as many drug users as the urine drug test was able to.

Hair Drug Test Panels Detect the Following Substances


A 5 Panel Hair Drug Test Screens For:

  • Cocaine
  • Marijuana
  • Amphetamine
  • Opiates
  • PCP
  • And More
A 10 Panel Hair Drug Test Screens For:

  • Barbiturates
  • Benzodiazepine
  • Methamphetamine
  • Ecstacy (MDMA)
  • Methadone
A 12 Panel Hair (Extended Opiates) Screens For:

  • Drugs included in the 10 panel +
  • Buprenorphine
  • Oxycodone
Additional Testable Drugs Include:

  • Methaqualone
  • Propoxyphene
  • Nicotine
  • K2 Synthetic Marijuana
  • Tramadol
  • Tricyclic-Antidepressants (TCA)
  • Fentanyl
  • Bath Salts

The Benefits of Hair Drug Testing With Quicktest Labs:

  • Drug Use Detection- Up To 90 Days- Hair drug tests by Quicktest Labs can detect drug use from the nutrients in the hair follicles as far back as 90 days, which is important for companies who want to maintain a “zero tolerance for drug use” policy.
  • No Reliable Alterants Available You Cannot Cheat A Hair Test- In addition to the historical usage information that a hair drug test provides, another advantage of hair testing is that it is a non-intrusive form of specimen collection and, at this time, there are no known adulterants for hair tests.
  • Lowest Texas Price & Fast Results- *Results are available in as little as 24 hrs from our Texas location. Get a comprehensive 5 or 10 panel hair drug test from Quicktest Labs and rest assured that you are paying the lowest price possible for your comprehensive and historically accurate drug usage results.
  • Paired With Urine for Recent Usage and Historical Usage- Because it takes 7-10 days for hair to grow above the scalp, a urine test is often ordered to report on recent drug use. Quicktest Labs provides the 2 tests together for those who want a full history of drug use.

Our Services

Fastest Lab Testing in Texas

At Quicktest Labs, we want to make every experience testing with us as comfortable and worry-free as possible. We know that, whatever your reason for testing, quick results can bring peace of mind. We have the shortest wait times in the industry. We will serve our customers within 5 minutes of their arrival. On most tests we provide instant test results. On Lab tests we typically provide results in 24 hours (depending on type of test performed).

You'll be amazed at how quickly you are helped by our professional and precise our staff. Our lab techs will help you through the testing process with the highest level of professional customer service.

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TCOLE Drug Test Lab

TCOLE Provider!

One stop shop for TCOLE L-2 and L-3 Form Requirements

Quicktest Labs is a TCOLE provider, and we welcome any law enforcement to fulfill both the Licensee Psych Health L-3 form (physical and drug test) and the Licensee Psych Health L-3 form (psychological evaluation) requirements at our one stop shop!

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drug and dna test Texas

Our Certified Drug and Alcohol Testing in Texas


We provide drug, alcohol, and DNA testing in Texas for both private and legal purposes. Our certified drug and alcohol testing collection labs can provide drug testing by way of urine, hair, saliva, fingernail, sweat / skin, DOT, environmental, and steroids. Our drug test panels also have a broad range to screen against the most basic drugs up to screening for a full array of drugs.

We provide Texas drug and alcohol screening services for both individuals as well as employers. Contact our alcohol or drug screening lab to find out more about our testing services.

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