I think you're confused about the meaning of "nutrient". Oils, or more generally fats/lipids, are macronutrients[1], as is the case with sugar and "highly proce

I think you're confused about the meaning of "nutrient". Oils, or more generally fats/lipids, are macronutrients[1], as is the case with sugar and "highly processed flour". A diet with a variety of different foods (whether they come in boxes or are "processed" is irrelevant in general) and a good balance of macronutrients and micronutrients is healthy. I'd say the largest public health issue related to this is that most people eat an overabundance of carbs. The next most important is that people don't eat a large enough variety of foods (or supplements) to get sufficient micronutrients. [1]: https://en.wikipedia.org/wiki/Nutrient https://en.wikipedia.org/wiki/Nutrient