I wonder if it's possible to design a personal device that can track most of the 100+ biomarkers named in the front page of this website. I guess that do do so it must analyze more than the blood (through LEDs reflections), for example saliva or feces.

After all my watch tracks already 6/7 of them, why not 100?

(OP) This was fun to write.

The most surprising thing I learned that coconut milk is a lot less healthy than I would have guessed (high in lauric acid).

I had always heard that dark chocolate was heart healthy, in spite of being high in saturated fat. In addition to the effect of antioxidants, the stearic acid in dark chocolate quickly converted by your liver into oleic acid (a monounsaturated fat).