It seems the more "knowledge" reductionist "science" gives us,

the worse off we are in the area of nutrition. I've given up chasing the next big discovery
(is the current one still Omega-3?) and returned to culture for guidance.

Dr. David Katz (of Yale U) has a point when he said that most people already
know how to lead a healthy life; the hard thing is to do it.

As for "你的胆固醇, 为什么会升高?", some people might still devote their life to find the answer and the silver bullet.
For me, that question doesn't exist.