Unfortunately, not all CBD is produced equally. CBD oils obtained from whole-plant extracts also sold as full-spectrum oils, are commonly recognised to be greater quality than those created from CBD isolates.
High-quality CBD oils aren't cheap to manufacture, so if the price is too low, that's a good sign that it was produced from lower or contaminated raw substances, sub-standard solvents, or it doesn't hold very much if any, actual CBD in the product.
Before purchasing CBD oil, check to see if the company has had its products verifiably tested. A business you can trust will present the results public. The information should be published on the website. If you can't find it there, then it is time to start questioning.
You can read about what happened when we tested some random CBD products on Amazon UK on our blog page.