I'd like to second the diet bit, namely that it can be an effective tool in some cases. Specifically, I have a relative who has trouble maintaining healthy kidneys. The primary tactic she uses to mitigate things is to avoid meat.
I have seen it work for 1000s in the Facebook group Natural Kidney Journey and across the Internet. Many success stories daily seen on that group match my positive results like your relative's same results.
Not sure why there is such downvoting going on about suggesting becoming more healthy to better your life and or at least try it to see if it works. Those who are highly negative are you saying a kidney patient who goes vegetarian or vegan is hurting themselves? Love to hear your thoughts!
Also, your comment made it seem like diet change is a silver bullet, when it is not. My relative has had a couple of times where she's had to use medicine to keep her kidneys from going non-functional.
I'm aware that you might not have intended it to frame diet change, but that's how it comes off.
Decreased extreme workouts that raise creatine, stopped/will not take any form of meds or pills, started drinking 3 liters of water daily and started cooking all my meals At home. My diet was horrible before ..no water, chic fil grilled chicken each morning and outback/bar food almost nightly. Though it wasn't fried bar food I cut that out long ago but food prepared by you is always going to be healthier then eating out.
So far my plant based renal doc and I are seeing positive results. Further I no longer have fluid build up when sitting for long periods.