eGFR – or in my case GFR has been up and down a little over the years since my fall. In 2008 it was >90, I think the lowest it’s been has been 80. I found a mention of CKD 1 (like you, looking for answers) but no-one medical has brought this to my attention, or shown any concern, so maybe it’s normal for someone my age ?
BUN – only ever had one of these tests (whilst in America funnily enough!), this was 11 (normal range 7-23) so that was ok.
Creatinine – I’ve had 20 tests, the average of which is 69.8, considering the normal range is 60 – 120, I would say that I’m always teetering on the edge of Dehydration.