What is the healthiest diet?

Simply put, nobody knows for sure.  Beware anyone who claims to have The Final Answer.

This is a question best answered by science.  And science is not anywhere close to answering this question in full.

Sure, we have some preliminary answers.  Eating too many trans fats can be bad.  Eating too little protein, fat, and various vitamins and minerals can also be bad.

That’s all fine & good, but that still doesn’t really answer the question.