Ditto what Razzle said. Yes, low carbing makes your kidneys and liver work a bit harder (isn't it wonderful that they're designed to handle that?). But then again, exercise makes your heart work harder and I have yet to hear someone say that exercise is bad for you based on that. There has yet to be a reported case of liver or kidney disease that could be directly linked to a low carb lifestyle. On the other hand, there have been a host of diseases that CAN be linked to a high carb lifestyle. Ask for a quote from a legitimate study the next time someone tells you that this WOL is harming you. In the mean time, I'd keep doing what you're doing because it's obviously benefitting you. Do make sure you get a thorough blood and urine workup if for any reason just to put your mind at ease and give you a baseline to compare against as you go. Good luck!