Gloss and Vickrey conducted a Cochrane systematic review of the use of CBD in the treatment of epilepsy (11). Their methodology included only those trials that were randomized and controlled and excluded case series, case reports, and expert opinion. They were able to identify only 4 randomized controlled studies reported in the literature, and they included a letter to the editor and an abstract. The total number of subjects enrolled in these studies was 48 (11–14). While only four studies and a letter to the editor were in the actual analysis, the authors included a complete reference listing of all articles reviewed for inclusion.
Pioneers of the CBD industry, 4 Corners Cannabis helped pave the way for companies that want to provide quality products and utilize best practices. They grow their own strain of hemp and make small batches of true full-spectrum CBD products. Their prices place them lower down on our ranking, but their highly satisfied customers are more than willing to pay for the 4 Corners quality.
To make matters worse, many of the third parties selling hemp seed oil on Amazon seem to be intentionally vague in their product descriptions. Many of the product listings for hemp oil on Amazon don't clarify whether the product includes CBD or not. So many unsuspecting consumers buy these products thinking they are CBD oil when in fact they are not. If you read the reviews of these products on Amazon, you'll notice many complaints from people who feel duped.
How to vape CBD oil is up to you, but remember that effects are stronger as a concentration of cannabidiol rises. Vaping CBD oil is nothing special and unlike nicotine, users of CBD vape oils work their way up instead of the opposite. Vape oil on itself is safe and there is a lot of scientific evidence that clearly demonstrates that CBD oil for vaping has genuinely nothing to do with getting high.