In that post I was speaking of Sonny taking pain meds that destroy your kidneys. My MIL's doctor told her when she had to go on dialysis that she kept wanting pain medications and that is what destroyed her kidneys. Sonny takes a lot of medications, including over the counter ones. He does not read the warnings that come with them.
As for foods, I don't try to push people to eat low carbs even though I know it is the healthiest way to eat. Check out Dr. Berry's videos on YouTube. He explains this so it is easy to understand and he posts his resources on each video. This is one of his many videos on kidney disease.