[myself248]

I'd picture something like a finger-prick blood sampler akin to a glucose meter.

Might not be something I'd do every day forever, but I could see doing daily samples for a week to get a feel for aboroption, then occasionally to check how my supplements and sun exposure are working.

If you could build a thing that can measure several different parameters depending on which test strips you load into it, I'd buy a pack of vitamin D strips, a pack of vitamin B, a pack of testosterone, and pack that looks for markers of inflammation. Heck yeah. My doctor would eat that data right up.