I have no background in chemistry.
What is a good way to start understanding principles of human body - how it works, determine which meals are good or bad for health. Maybe it is not just chemistry, but some other fields, too. I just want to know how human body works, lets say - improve health - but on my own. Knowing just that this is not good for health is not enough for me. I want to build deep knowledge.
I want to know how it is functioning at the lower level (based on chemistry).
Where to start?
(sorry for my incompetence)