xep

This situation does occur. As an example, look up the diet-heart hypothesis, and “the French paradox.”

Calcium and electrolytes like magnesium can be tricky. You’re spot on with your assessment, I think.

Carbohydrates and fibre aren’t essential nutrients (I know it sounds crazy, but look it up, even the national academy of medicine agrees.) But try to even say this on here and watch the downvotes pour in. In fact, look at how many downvotes this comment is going to get.