I found out last August for the first time that my kidneys were damaged from years of using ibuprofen for chronic pain from a car accident. My gfr was 40 to 45. My creatinine, protein, and potassium were all high.
I was seriously upset. So, I found this online group, fed myself a strict kidney diet, and,of course, NO NSAIDs. For pain, I chose edibles. For inflammation, I have a lot of ginger in my food and take turmeric with ginger capsules.
My latest gfr was 60 and I'm almost to normal range for creatinine and protein. My potassium is normal level. Blood sugar at highest end of normal, so I need to watch that. My nephrologist was impressed. He thinks that I can avoid dialysis, though gfr drops with age.
So, whatever you do, follow the advice of the dietitian and embrace the kidneys diet.