[alistairSH]

In my life, eggs have been both bad and good. Butter vs margarine. Atkins vs paleo vs whatever else. Calorie restriction vs more exercise.

Lots of junk science. Lots of marketing fluff. But, also lots of recommendations that were assumed correct but didn't stand up to deeper scrutiny.

Note, I'm not saying any of this is bad, or that scientists are stupid and wrong all the time. Just always amazed about how much our understanding of the human body has changed in the last ~50 years.

[radlad]

Thanks. All of those examples aren't about macronutrients though, which I thought were fairly well understood. (Though I'm sure various myths about them have been spread: such as another commenter suggesting "you can't get fat if you don't eat fat.")

Nutrition is definitely a minefield, I'm with you there!