Thank you very much bro for sharing your research...this is some very positive info for me...according to that calculator my eGFR is 112.7, definitely in the normal range, to say the least. I will bring this up with my doctor immediately...not once was i asked how much i currently weighed and there were no questions or indications that body mass had any effect on eGFR readings...even though i asked. We really need to get a doc on CBB who knows his shit and can get us to educate our doctors a little...or a lot.. My doc is suppose to be a specialist in sport's medicine and is actually the doc for my town's OHL Hockey team....sad...