For me it is the omega 6/3 ratio
What say you hackers?
This two-part test:
A. Do you feel healthy?
B. Do you feel happy?
This has always been a better indicator of health for myself than any lab test. My n6/n3 intake has never correlated well with my health (of course, this is n=1, and I've only had it measured once), but the above test always does! If I had to pick a lab test, I guess it'd be n6/n3 or salivary cortisol.
I like serial waistline measurement. For me, it's a sensitive indicator of how much I've been cheating and how effective my recent exercise regimen has been. Best of all, it's free.
Please Hack - Blood Test Results 3 Answers