The following article is an excerpt from http://www.charlespoliquin.com
Two of the most common misconceptions about high-protein diets are that they will hurt your kidneys and that eating a lot of protein will lead to bone loss and osteoporosis. For healthy people, neither of these are true.
In fact, the evidence suggests high-protein diets can improve bone strength, and of course, eating high quality protein supports the maintenance of muscle mass as we age, which is a primary factor in bone health and the prevention of fractures related to osteoporosis.
In terms of kidney health, people with normal kidney function do not endanger their kidneys by eating a high-protein diet, but for people with risk of chronic kidney disease, high-protein diets may compromise kidney function. The relationship between kidney function and large dietary protein loads is intricate, and I will review it below so that you can understand it and make your own decisions about protein intake.
This article will dispel the myths about high-protein eating and present five dietary strategies you should use to get the best health and body composition results out of a high-protein diet.