After 60+ years of listening and reading nutritionist and diet information I've now seen the whole enchilada reduced to 7 words from Michael Pollen (writer of 'The Omnivore's Dilemma', et al).
"Eat food. Not too much. Mostly plants."
I read this in my Noom studies today and a light went on. It was Alexander Pope who said "What oft was thought, but ne'er so well express'd”. That kind of sums up Pollen's seven words.