CBD cannabis is cleared through the liver and the G.I. tract so it should not negatively affect your kidney function and it very likely will help you get off medications that could negatively affect your kidney function so that is a potential benefit but I do not believe that there is proof that CBD’s will help your kidneys function better unless you have kidney problems as a result of chemotherapy. CBD’s due help to reduce inflammation and cell death that could be caused by cisplatin a common chemotherapeutic agent. The article and study maybe found on www.ncbi.nlm.nih.gov website
So if CBDs do not hurt you but likely will help you consider trying CBDs to potentially improve your health.