I used to measure my blood sugar after meals that I wasn't sure were gonna be bad for me, but I've stopped because I can tell immediately when something spiked my blood sugar, or had something non-primal in it. I get a distinctive crappy feeling that I can't even explain, but I know right away it means I just ate something with hidden garbage in it.
There is a pleasure in the pathless woods,
There is a rapture on the lonely shore,
There is society, where none intrudes,
By the deep sea, and music in its roar:
I love not man the less, but Nature more...