Looking for one of the most accurate and sensitive alcohol detection methods available today? The Phosphatidylethanol (PEth) Blood Spot Test might be the solution you need.
Used for monitoring long-term alcohol use, this advanced test is ideal for legal cases, professional accountability, medical assessments, or personal wellness checks. It’s quickly becoming the gold standard in alcohol detection due to its 99% sensitivity and ability to detect alcohol intake over several weeks.
What Is the PEth Test?
Phosphatidylethanol (PEth) is a direct biomarker formed only in the presence of alcohol in the body. Unlike traditional alcohol tests that detect ethanol itself, the PEth test identifies this unique compound, providing a precise indicator of alcohol consumption.
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Extremely sensitive (99%) – detects even small amounts of alcohol over time
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Highly specific – differentiates between social drinkers and chronic users
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Unmatched reliability – more accurate than CDT or liver enzyme tests
Because it forms only when alcohol is consumed, there’s virtually no risk of false positives from incidental exposure, like using hand sanitizers or alcohol-based cleaning products.
How Does the PEth Blood Spot Test Work?
The PEth test is both simple and discreet. At Test Smartly Labs, we can collect the required blood sample through a quick finger prick—no full blood draw necessary.
Process Overview:
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Sample Collection
Just five large drops of blood (about 5 mL) are needed. -
Lab Testing
The dried blood spot is analyzed in a certified lab using advanced instruments. -
Storage Flexibility
Dried blood samples can remain stable for up to six months, making this test great for future analysis or retesting.
You’ll receive clear, conclusive results within a few business days—ideal for time-sensitive situations.
Why Choose PEth Over Other Alcohol Testing Methods?
When compared to other alcohol detection methods, the PEth test stands out for its accuracy, detection window, and reliability.
Advantages of PEth Blood Spot Testing:
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Long detection window: PEth remains in the blood for 2 to 3 weeks, and longer with heavy or binge drinking.
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Differentiates drinking patterns: Distinguishes casual, moderate, and chronic drinking.
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Not affected by external variables: Age, medications, and health conditions do not impact results.
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Ideal for monitoring abstinence: Especially helpful for rehab programs, court monitoring, and custody cases.
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Resists incidental exposure: Unlike EtG, this test is not triggered by alcohol-containing products used externally.
Blood Alcohol Testing vs. PEth Testing
While Blood Alcohol Concentration (BAC) tests determine alcohol levels at a single moment in time, PEth testing provides a longer-term snapshot of alcohol use. If you’re seeking court-admissible evidence or need to confirm recent consumption history, both tests are useful depending on your goals.
Why Use Our BAC Tests?
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Immediate alcohol level detection
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Common in DUI and legal settings
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Samples can be retested for legal proceedings
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Performed by trained, certified professionals
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Mobile services available – We can come to you
Visit our Kansas City locations or Schedule an Appointment online for BAC or PEth testing today.
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A blood alcohol test will determine blood alcohol concentration (BAC) at the moment of a blood draw. This is a reliable way to determine the amount of alcohol in someone’s bloodstream. It’s one of the most common tests used to prove if someone was legally drunk. We use proper procedures (chain of custody) with trained, experienced professionals whose professionalism will ensure the BAC test is accurate and reliable.
What to Bring to Your Test
To help us serve you efficiently, please come prepared:
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Government-issued photo ID
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Authorization paperwork (if applicable)
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Completed TSL Intake Form & HIPAA Disclosure
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Payment at time of service
Additional Tips:
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Urine Test: Stay hydrated. Arrive at least 1–3 hours before closing.
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Hair Test: Make sure your hair is clean and dry.
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Nail Test: Remove all polish and artificial nails before arrival.
Note: Prescription information isn’t required onsite. If necessary, an MRO (Medical Review Officer) will follow up to verify medications post-testing.
Frequently Asked Questions
What Are Your Hours?
All Test Smartly Labs are open Monday through Friday, from 9am – 5pm
Do We Need To Have An Appointment?
No appointment is required to come into our labs, and all of our locations are on a walk-in basis. However, it is recommended you arrive at least 30 minutes prior to closing. If your situation requires special time considerations, please call us to determine if it would be better to arrange an appointment time.
Do I Need Doctors’ Orders For Testing?
No doctors’ orders needed, we are a Direct-Access Testing Center. You are encouraged to consult your medical professional with your lab test results.
What’s The Turnaround Time For Lab Work?
Average turnaround time is 2-5 business days depending on the complexity of the lab work. Most tests are available in 2-3 days.
Do You Need A List Of My Medications For A Drug Test?
Per protocol, the lab techs are not allowed to receive or ask for your medications. A medical review officer or MRO, a licensed physician who specializes in toxicology, will call you and ask for your medications and your physician’s phone number if it’s detected in your sample during testing. The MRO will then call your physician to verify your medications.
Whatever Lab Test, Drug Test Or DNA Test You Need, We’re Here To Help!
Test Smartly Labs is your one-source for a Direct-Access Lab Testing in Greater Kansas City. We partner with only the leading laboratories in the USA to provide accessible, affordable, and accurate lab tests, drug & alcohol tests, and advanced DNA testing. We specialize in local access for ALL TYPES of testing, and we make it super easy for you! Helping you take control of your health through lab testing is our only business!
