@SelfBiasResistor FYI: I just checked my chart. My creatinine was at 1.3, not 1.7.
So Creatinine was 1.3 (range reference = .6-1.2) and the BUN was at 19 (range reference = 7-18)
Update.
I've been taking a break from kava to figure out my kidney situation. I have continued to take creatine, but have been much more careful not to exceed 4-5 grams/day. I've only drank grog one time in the last few weeks. Just did a follow-up blood test.
My Creatinine level is now at 1.1 (.6-1.2) and my BUN level is now at 18 (7-18). So they've both dropped to the top of the normal range. I will probably slowly start to drink more grog now and have it checked again later. I might not go back to drinking every single day, though, as I've been really enjoying the increased energy and have have been jogging daily; I kinda like that (though, knowing my personality, I won't be overly surprised if I slip into daily drinking (grog) again). I've probably been better hydrated too.
It's interesting that it was only a minor drop; given the near total cessation of kava while continuing creatine. I'll be curious to see what happens as I add kava back in.