Nearly half of CBD products tested had inaccurate labels
Testing of 80 commercial CBD products found that 46% had CBD concentrations more than 10% off from their label claims, with some products containing less than half the advertised amount.
Quick Facts
What This Study Found
Of 80 products, 37 (46%) contained CBD concentrations more than 10% different from label claims. Discrepancies ranged from 0.9 to 30.6 mg/mL off from the label. 12 products were underlabeled (more than 110% of claim) and 25 were overlabeled (less than 90% of claim). Overall concordance within 10% tolerance was only 54%.
Key Numbers
80 products tested. Label claims: 7.5-60 mg/mL. Measured: 2.9-61.3 mg/mL. 37 products (46%) outside 10% tolerance. 25 overlabeled (too little CBD), 12 underlabeled (too much). Concordance rate: 54%.
How They Did This
LC-MS/MS analysis of 80 commercially available hemp-derived CBD products from online and local retailers in central Kentucky. CBD concentrations were compared to label claims. Epidiolex included as a regulated positive control.
Why This Research Matters
When nearly half of CBD products contain the wrong amount, consumers cannot reliably dose. Too little means no benefit; too much risks drug interactions and liver enzyme elevations.
The Bigger Picture
The CBD industry's labeling accuracy problem is not improving. Without good manufacturing practices and mandatory testing standards, consumers have little way to know what they are actually taking.
What This Study Doesn't Tell Us
Products from one geographic area. Single time point. Did not assess whether labeling accuracy varied by price point, brand type, or sales channel. Epidiolex as the only regulated comparator.
Questions This Raises
- ?Would third-party testing requirements improve label accuracy?
- ?Do consumers who think CBD "doesn't work" simply have underdosed products?
Trust & Context
- Key Stat:
- 46% of products mislabeled; only 54% concordance
- Evidence Grade:
- Validated analytical methods with appropriate sample size of commercial products and a regulated control.
- Study Age:
- Published in 2022.
- Original Title:
- Label accuracy of unregulated cannabidiol (CBD) products: measured concentration vs. label claim.
- Published In:
- Journal of cannabis research, 4(1), 28 (2022)
- Authors:
- Johnson, Erin(3), Kilgore, Michael(3), Babalonis, Shanna(8)
- Database ID:
- RTHC-03939
Evidence Hierarchy
Watches what happens naturally without intervening.
What do these levels mean? →Frequently Asked Questions
Are CBD product labels accurate?
In this study, only 54% of 80 CBD products had CBD concentrations within 10% of their label claims. Some contained less than half the advertised amount.
What are the risks of inaccurate CBD labels?
Underdosed products may provide no therapeutic benefit, while overdosed products increase the risk of side effects, drug interactions, and liver enzyme elevations.
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Cite This Study
https://rethinkthc.com/research/RTHC-03939APA
Johnson, Erin; Kilgore, Michael; Babalonis, Shanna. (2022). Label accuracy of unregulated cannabidiol (CBD) products: measured concentration vs. label claim.. Journal of cannabis research, 4(1), 28. https://doi.org/10.1186/s42238-022-00140-1
MLA
Johnson, Erin, et al. "Label accuracy of unregulated cannabidiol (CBD) products: measured concentration vs. label claim.." Journal of cannabis research, 2022. https://doi.org/10.1186/s42238-022-00140-1
RethinkTHC
RethinkTHC Research Database. "Label accuracy of unregulated cannabidiol (CBD) products: me..." RTHC-03939. Retrieved from https://rethinkthc.com/research/johnson-2022-label-accuracy-of-unregulated
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.