“There is a huge void of research in terms of confirming most effective dosing for various symptoms,” says Eric Baron of the Cleveland Clinic Neurological Institute, who has written several papers about the effects of THC and CBD on headaches, “so most of this is done by trial and error and self-titration.” Yes, most of the research on CBD is being done by consumers who are just ... trying stuff.
One of the strongest nutraceutical CBD oils is called Charlotte’s Web, with a 50mg dose. Charlotte’s Web is produced in Colorado by the Stanley Brothers, and named after Charlotte Figi, a girl who became famous in the US after her frequent seizures, brought on by the rare Dravet syndrome, were greatly reduced when she started taking CBD oil aged five. The company makes THC products too and is extremely successful, having just offered shares on the Canadian securities exchange, raising about $100m.

Cannabis CBD Oil