I was diagnosed with Type 2 diabetes about 15 years ago but wasn't diagnosed with early CKD until 2016. I always have a flu shot but got the flu in the winter of 2017-18 and a month later my GFR was at 28! (Stage 4 CKD.) As a retired nurse I knew to immediately go on a renal diet and within two month my GFR was at 33%. At that time I went on a vegetarian renal diet (it can't be called vegan because I eat egg whites) and a month after that my GFR went up to 35 %, in other words I went from stage 4 to stage 3 - barely. I have found 2 websites to be extremely helpful in determining potassium and phosphorus values of various food items: a nutrition data site (one of the keywords is Self) and a nutrient ranking tool on a myfooddata site. Unfortunately as a new member I cannot yet post links or URLs so will try to do that later on. It hasn't been easy but I think I've finally come up with a vegetarian renal diet for myself which is diabetic-friendly, tasty and filling. (Latest A1C was 5.8) Am waiting for latest metabolic panel results to see if my GFR has improved and if potassium and phosphorus levels are better. Wish me luck!