Thanks a lot, Paul! That was all very informative. I will start down the path of the WHY of nutrition, I guess it's too important to leave to the experts
I will compile a book list and fix my own learning path, probably guided by a friend who studies pharmocalogy. That reminds me, she explained to me in detail the difference between saturated fats and unsaturated fats, including the molecules. It was very interesting and I look forward to learning more about such things.
Thanks again!