Keystone Laboratories Inc.

Delta-8 Drug Testing

Multiple Testing Specialties

Keystone Laboratories provides customizable solutions for providers with industry-leading specialists in urine, oral fluid and blood specimen testing.

Dual CAP Accredited

Keystone meets the standards from CLIA, FDA and OSHA. CAP requirements commonly exceed the standards, bolstering patient care and safety.


Years Of Trusted Laboratory Testing Experience

Delta-8 Drug testing

The Trusted Laboratory For Delta-8 Drug Testing

Providers need to be able to make treatment decisions with absolute confidence. In order to do that, you need a toxicology testing solution that is both timely and reliable. Keystone has been working with providers since 1987, and we’ve learned that most providers aren’t able to get the toxicology testing they need when they need it. That is why Keystone offers you a host of testing and monitoring services so that every treatment decision you make is a confident one.

Custom Testing Panels

Get customized clinical lab services that are just right for you and your clients

Rapid Turnaround Time

Our lab test results are reported back quickly for client satisfaction

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About Delta-8 Drug Testing

The use of Delta-8 THC has grown tremendously in the last year or so since it is viewed as a federally legal alternative to delta-9 THC, capable of producing a milder euphoric high. With so many people interested in delta-8, the question on everyone’s mind is, “does delta-8 show up on a drug test?” as well as “how long does delta-8 remain in your system?” 

We wanted to answer those questions and help you further understand what it is that we are testing for and how our tests work.

What is Delta-8?

Over 100 distinct cannabinoids – chemicals that impact the body — are found in the cannabis plant. You’ve probably heard of the two most abundant cannabinoids: cannabidiol (CBD) and THC. However, cannabinol (CBN), cannabigerol (CBG), tetrahydrocannabivarin (THCV), and delta-8-tetrahydrocannabinol are all minor cannabinoids found in trace levels (delta-8).

Delta-8 resembles THC in many ways. THC is known scientifically as delta-9-tetrahydrocannabinol (also called delta-9). This means that delta-8 and delta-9 are two distinct types of THC molecules. Is delta-8 THC going to cause you to fail a drug test? Delta-8 THC can appear on a drug test in the same manner as delta-9 THC does since the molecular structures of delta-8 and delta-9 are almost identical. Drug tests aren’t as sophisticated as you might expect. Delta-8 items may also have more than the federally permitted maximum of 0.3 percent delta-9, owing to irresponsible manufacturing and production procedures. This, too, can be the cause of a drug test failure.

When you take THC (delta-8 or delta-9), your digestive system metabolizes it using the P450 system, a collection of liver enzymes. THC and its variations are broken down into distinct metabolites during the metabolization process. These metabolites are what the drug tests look for. Unfortunately, most drug tests frequently fail to distinguish between each THC metabolite. A drug test will not differentiate between delta-8 and delta-9 products if you ingest both.

Keystone Lab provides clinical and forensic toxicology testing services throughout the southeastern U.S. and is now one of only a few labs in the nation to offer delta-8 testing!

How long will delta-8 remain in your system?

Delta-8 is detectable in your system for a longer period than you might expect. As a general rule, delta-8 should be expected to stay in your system for the following periods of time:

Saliva – 1 week to 24 hours

Sweat can last up to a week.

Blood might last up to a week.

3-77 days for urine

Hair can last up to 90 days.

It’s a common myth that delta-8 and other THC variations exit your system after a week or two. This is not accurate. They actually stay around for far longer than you’d think. Why? It all comes down to how your body accumulates and eliminates cannabis chemicals. Within the first week, your body excretes around 50-80 percent of delta-8 and all other cannabinoids through feces and urine, peaking around the 4–5-day mark. The remainder accumulates in your hair follicles and adipose tissue for up to 90 days, but this is only an estimate.

Why Test for Delta-8?

A drug test may be required for employment, participation in some organized sports, or as part of a police investigation or court proceeding. A clinician may conduct a drug test if you show signs of a probable drug overdose in a hospital emergency department. Delta 8 drug testing is typically performed in the same manner as another drug testing. It is discovered when they are searching to check if a person has ever used drugs in the past.

How to Test for Delta-8?

Urine drug tests can detect illicit drugs in two ways:

  • The Gas Chromatography-Mass Spectrometry (GC-MS) test combines gas chromatography and mass spectrometry and should be used when accuracy is essential. This type of test takes more time and is far more costly but will give a much more accurate reading. 
  • The Immunoassay (IA) Test – this is a fast biochemical test that checks for the presence of macromolecules in a tested material; it frequently yields erroneous findings. But this is the test most people start with because it is low-cost and quick.

Hair follicle testing and blood tests are two more types of drug tests. THC can be found in your hair for more than 90 days. Blood and saliva tests are commonly used to detect the presence of illegal drugs in drivers while on the road or after an accident.

How Do Delta-8 Tests Work?

Your body metabolizes the chemicals found in food and, in this case, drugs and produces metabolites. These leftover metabolites are found in your blood, urine, saliva, sweat, hair, and lungs after they have been processed by your liver. Even after the visible effects of delta 8 THC have worn off, there are still remnants in your system that the drug test can pick up on.

Workplace drug testing is designed to detect illegal drug metabolites. If you’re a professional driver, a corporate employee, or a public servant, drug testing can cause you to lose sleep if you use cannabis. To summarize, the purpose of drug testing is to verify that you’ve been using drugs, but they don’t care how much you’ve consumed.

Takeaways Regarding Delta-8 THC and Drug Testing

Delta 8 THC has swiftly captured the attention of cannabis consumers because of its more laid-back personality and decreased likelihood of inducing anxiety and paranoia.

If your job requires regular drug testing, you should be aware that delta 8 THC can cause you to fail a drug test. The tests are not designed to distinguish between the two, Delta 8 and Delta 9. They simply check for its metabolites, which are nearly identical in both variants.

If you want to keep your work after failing the initial screening, request secondary testing using a method that can distinguish delta 9-specific metabolites from those left by delta 8 THC. The Keystone Laboratory is one of the only toxicology testing laboratories in the country with the ability to distinguish between Delta-8 and THC. Contact us today to get Keystone Laboratory services offered at your business today!

Contact Keystone Laboratories To Get The Testing Solutions Your Practice Deserves!

Our Happy Customers

    Darlene Silver


    Keystone Laboratories has always helped in the line of work I do. Great turn around times and any time I need something Wally Brown makes sure that my lab has it. Shout out to Brittney, my Keystone courier! She is prompt and makes sure my specimens are transported. Very professional and kind.

      Brandy Shook


      As a phlebotomist in a 14 provider office accurate and timely results are a must! Wally Brown is a super representative who always makes sure we have what we need. Keep up the good work Keystone Laboratories!!

        Derrick Sexton


        I had to use this lab for a work related drug screen and they were very professional and prompt. I would recommend Keystone Laboratories to a colleague for sure.

          Amanda Daves

          Asheville Recovery Center

          Keystone lab is dedicated to assisting individuals with all their laboratory needs. I have utilized keystone labs for over 5 years now. They are knowledgeable and professional throughout the process. I highly recommend them!

          Keystone Lab Can Work With Your Preferred EHR Integration