There are different grades and levels of THC in the cbd oils. My wife has been on cbd 2% since back in the spring. She required back surgery to remove a cyst and then some fusing of discs. She has told me that this oil helped relieve the pain in her leg from thigh down to calf muscle. She was leary at first but did as the Dr. prescribed increasing weekly until relief was found. It's not cheap, not covered under medical insurance plan,but we found it works. Her doctor was involved with one of the companies first using the product and had more background to the drug and effects and what relief could be achieved.