A study conducted in 2016 of arthritis within rats, showed promising signs when miniscule amounts of CBD - 0.7, 3.2, 6.3 or 62.4, was administered over a period of months. It was clear from the tests conducted, that there was a significant reduction in inflammation within the rats, and also a reduction in irritation.
The tests on other rats who were given a lesser dosage of 0.7 and 3.2 mg of CBD, showed that their pain was not altered or reduced in any circumstance.
Concluding that 6.2 milligrams per day, was a sufficient amount of CBD to substantially reduce the pain and inflammation within the rats.
In summary. The use of CBD on humans has potential. Nonetheless, more research is necessary.