High BP will sure do it. I also agree smoking probably does not help. Regarding visiting an expert at Mayo, I have never been. But, I did make plans to go about a year ago and had to cancel. I found it to be very easy and quick. I am working on that again, but this time with a different purpose. It's good you will be seen in a few weeks. Sometimes kidney issues can move very quickly and most often they are not reversible. So, you do want to have it looked at. Regarding your food list, I'm not sure where you are getting your information. Often times renal diets are for those who are on dialysis and have little to no renal function. That does not apply to those who have renal function and just want to keep it. Regarding calories and nutrition, I use an app called "Lose It." It does an excellent job of tracking your nutrition intake with a very extensive database of foods. It makes it very easy to stay on plan. Peanut butter is very high in protein — but it is not animal-based. As you probably know, your body needs protein. It is a double-edged sword, though — you just don't need to exceed your target if you are working on helping your kidneys. As for english muffin, I don't know why that would be on the list you are reading. Maybe sodium. But, if your labs show your sodium to be in range, then I'm not sure I would worry about that. Regarding calories, as I mentioned, I have been on a 1000 calorie a day diet for well over two years. Except for my kidney issues, my labs are perfect. So, I'm not putting myself into malnutrition and I do believe the lightened load has helped my kidneys. I do eat lots of nuts and salads. Good luck.