I believe they are saying that the pain relieving effects last for about four months.
Probably better than using cortisone for joint pain, something I used to have done for my ankles.
I believe the study just lasted four months.
Castor Oil does wonders for knee pain...
HEAL Joint Pain And Arthritis VERY FAST In 1 WEEK | Barbara O’Neill
https://www.youtube.com/watch?v=zfjs_QCJ3Qo