Testing of 80 unregulated CBD products found THC in 65% of them, including 5 of 21 products labeled "THC-Free," with concentrations ranging up to 2 mg/mL.
CBD consumers, employers with drug testing programs, athletes, military personnel, and regulators.
24% of "THC-Free" CBD products contained detectable THC
What the researchers found
THC was detected above the quantification limit in 52 of 80 unregulated CBD products (65%). THC concentrations ranged from 0.008 to 2.071 mg/mL. Of 21 products labeled "THC-Free," 5 (24%) contained detectable THC levels ranging from 0.015 to 0.656 mg/mL.
Why it matters
Consumers choosing CBD products specifically to avoid THC may unknowingly consume it. This has implications for drug testing, employment, child custody, driving, and military service.
The numbers in context
80 products tested. 52 (65%) had detectable THC. Range: 0.008-2.071 mg/mL. 21 labeled "THC-Free," 5 (24%) contained THC (0.015-0.656 mg/mL). LOQ: 0.005 mg/mL.
How the study worked
LC-MS/MS analysis of 80 unregulated hemp-derived CBD oil products purchased online and from local retailers in central Kentucky, compared to the regulated control Epidiolex. Products were extracted by solvent extraction and quantified using a validated method.
What this study cannot tell us
Products from one geographic region (central Kentucky). Market may have changed since testing. Single time point does not capture batch-to-batch variation. Did not assess whether THC levels would produce psychoactive effects or positive drug tests.
How to read the evidence
Validated analytical chemistry methods applied to a meaningful sample of commercial products.
When this study was published
Published in 2022.
The bigger picture
The CBD market has outpaced regulation. When nearly a quarter of "THC-Free" products contain THC, consumer trust and safety are fundamentally compromised.
Questions still open
- At what THC concentration do unintended drug test positives become likely? Would federal regulation of CBD products solve the contamination problem?
Common questions
Do CBD products contain THC?
Can CBD products make you fail a drug test?
Read the original research
Cannabidiol (CBD) product contamination: Quantitative analysis of Δ9-tetrahydrocannabinol (Δ9-THC) concentrations found in commercially available CBD products.
Drug and alcohol dependence, 237, 109522
Citation
Johnson, Erin; Kilgore, Michael; Babalonis, Shanna. (2022). Cannabidiol (CBD) product contamination: Quantitative analysis of Δ9-tetrahydrocannabinol (Δ9-THC) concentrations found in commercially available CBD products.. Drug and alcohol dependence, 237, 109522. https://doi.org/10.1016/j.drugalcdep.2022.109522
Explore the wider topic
- Surviving 4/20 Sober: A Practical Survival Guide
- CBD Oil Quality Guide: How to Avoid Snake Oil
- CBT for Cannabis Recovery: How Cognitive Behavioral Therapy Works
- Anxiety After Quitting Weed: When to Consider Medication
- Cannabis for Chemotherapy Nausea: What the Evidence Actually Shows
- Cannabis for Chronic Pain: What the Research Actually Supports
- Cannabis and Epilepsy: The Epidiolex Story and What It Means
- The Cannabis Relapse Cycle: Quit, Feel Good, Get Complacent, Repeat
- Does CBD Actually Work for Anxiety? What the Evidence Shows
- Does CBD Help with Weed Withdrawal? What Studies Show
- CBD vs THC: The Differences That Actually Matter
- Cold Turkey vs Tapering: Which Way to Quit Weed
- Dating Sober After Years of Being High: What Nobody Tells You
- Exercise as Medicine: Working Out After Quitting Weed
- Grieving Weed Itself: Mourning the Loss of a Companion
- How to Help Someone Quit Weed (When They're Not Ready)
- How to Quit Weed: A No-Judgment Step by Step Guide
- Journaling Through Weed Withdrawal: Why Writing Helps You Heal
- MA vs SMART Recovery vs Therapy: Comparing Your Options
- The Proven Medical Benefits of Cannabis: What Research Supports
- Meditation and Mindfulness for Weed Withdrawal
- Your Partner Still Smokes Weed: How to Navigate It
- Quitting Weed While Your Partner Still Smokes
- The Pink Cloud Effect: When Quitting Weed Feels Too Good
- How to Quit Smoking Weed Cold Turkey: What to Expect
- Quit Weed or Cut Back: Which Is Right for You?
- I Quit Weed and Regret It: An Honest Look at Non-Linear Recovery
- Quitting Weed in Your 20s: Career, Social Life, Starting Over
- Quitting Weed in Your 30s: It's Not Too Late
- Quitting Weed After 10+ Years of Daily Use: What to Expect
- Quitting Weed Before Surgery
- Quitting Weed During a Life Crisis: Divorce, Job Loss, and Other Bad Timing
- Quitting Weed and Working Out: How Exercise Helps Recovery
- Quitting Weed After Loss: When Grief Comes Flooding Back
- Quitting Weed When It's Legal Everywhere
- Weed and Medications: What Changes When You Quit
- Quitting Weed During Pregnancy: What You Need to Know
- Quitting Weed While Pregnant: What You Need to Know
- Weed Withdrawal Success Stories: Real People Who Made It Through
- Quitting Weed Long Distance: When You Can't Remove Triggers
- I Relapsed on Weed. Now What? A Practical Reset Guide
- I Relapsed After Quitting Weed: What Now?
- Cannabis and Older Adults: Risks Seniors Should Know
- Should I Quit Weed? A Decision Framework (Not a Lecture)
- Quitting Weed at Music Festivals and Concerts: A Sober Survival Guide
- Supplements That Actually Help with Weed Withdrawal (And Ones That Don't)
- How to Tell Your Friends You're Quitting Weed
- Cannabis and Breastfeeding: THC in Breast Milk
- Relapse Prevention Plan for Cannabis: A CBT-Based Approach
- Why Weed Relapse Happens: The Science Behind Going Back
- Replacing the Ritual: What to Do When You Quit Weed
- How Cannabis Damaged My Relationships: Before and After
- Social Media Detox from Weed Content