I know people (yes, PEOPLE) that have cured themselves of advanced kidney and liver disease by long periods of fasting. The doctors told them there was nothing they could do, of course. I have kidney damage that I'm working on by doing periods of vegetable juice fasting. I'm positive that starches and sugars are definitely more likely to harm kidneys than ketosis or high protein intake. If I eat a large amount of sugar or starch my kidneys ache the next day. Look at how cats have high rates of kidney disease. My bet is that if starches weren't added to cat food, this wouldn't be the case.
Type 1 diabetic for 25 years.
Low carb for 7 years, LC Primal for 2.5 of those.
Fruit and starch free.
Total weight loss- 3 stone/42 pounds. Current weight = 121 pounds. Height 5'5
I take Zymessence systemic enzymes.