A Harvard study of women over a 15-year period found that animal proteins, and the cholesterol associated with them, are mostly responsible for kidney problems. Our kidneys are filters for all of the blood that we have, so anything that is in our blood gets deposited in our kidneys. They are especially designed to filter out phosphorous, and animal proteins are higher than plant proteins in phosphorous content. A way to protect our kidneys from early failure is to decrease the amount of animal proteins that we consume. Tests have been done with lowering animal protein in diets and positive results have been seen.
Read full article here Preventing and Treating Kidney Failure With Diet