CBD Examine purchased 65 popular CBD oil products and sent them to an independent, ISO 17025 certified laboratory to test each one for cannabinoid levels. We published all of those test results on this site as product reviews. In this industry report, we summarize our findings.
Of the 65 products we tested, 31 received an A score for accuracy, having cannabinoid levels within 10% of their product claims. Nine products we tested got D’s and F’s for having cannabinoid levels that were more than 30% off from what their labels’ claimed. Read more about the accuracy ratings below in the Accuracy Ratings section of this report.
We tested eight CBD products sold on Amazon.com. All eight contained CBD and six also contained THC. One of Amazon’s most popular CBD products, R+R Medicinals, contained a whopping 63 mg of THC. Amazon claims to prohibit CBD and THC products. However, a search for “CBD” on Amazon displays over 10,000 products and they even have a page for their top “CBD Oils.”
A Certificate of Analysis (COA) is a third-party test that “proves” a CBD product contains the amount of cannabinoids claimed on its label. Our testing found COAs provided by manufacturers completely unreliable. We found that the majority of mislabeled products (inaccurate by 30%+) came with a COA from the manufacturer. For example, our lab results found 69.13% fewer mg of CBD than the COA provided by Hemp Bombs. Joy Organics came with a COA that claimed zero THC, while our testing found THC in their product.
Charlotte’s Web, Palmetto Harmony, and Haleigh’s Hope are popular CBD brands for treating epilepsy. All three brands contained substantial amounts of the cannabinoids CBC and CBG, which research shows may be partially responsible for reducing seizures
Accuracy scores are based on the difference between the product's label and the amount of cannabinoids or CBD found in the product. We base calculations on total cannabinoid levels for labels that are not specific. For example, a product that has a label with "500 mg" is calculated as total cannabinoids. A product label that specifies "500 mg CBD" will receive an accuracy score based on CBD levels.
Value Scores above are based on cost per of mg of CBD on the product that we purchased and tested. Note that many products come in larger discounted sizes, which we describe in each review. Remember to look at the “accuracy” score and read about the “good” and “bad” of each CBD company before making a purchasing decision.
CBDexamine.com is consumer advocacy group that shows consumers what’s inside their CBD products. All 65 product reviews are available for free at CBDexamine.com. Products tested included some of the most popular brands according to Google ranking, market research reports, CBD review websites, or top rated brands sold on Amazon.com. We are not affiliated with any of the CBD companies reviewed. (Update 2020: at the time of this 2019 report, we had no affiliations. In July of 2020, we started using affiliate links to support our independent lab testing.)