Hi Baldhunk and welcome to the forum!

The next time someone tries to tell you that a low carb lifestyle will damage your kidneys, ask them where they got their information. Likely it will be something that they read and believed without checking it out or something that they heard and again didn't bother to check out. The fact is, that there is not one single study that shows that a low carb, adequate protein diet will harm healthy kidneys in any way and there are entire cultures (the Inuits, for example) that have traditionally thrived on mostly meat and fat diets. What most people refer to when they say that high protein will damage your kidneys is that the glomular filtration rate (GFR) goes up when a person consumes higher amounts of protein. This is not an indication of damage or disease in a person with healthy kidneys, but rather an indication that your kidneys are capable of doing what they were designed to do...filter! Exercise raises my heart rate, but I have yet to hear someone say on that basis that exercise is bad for us.