Protein
Yes
IS a MACRONUTRIENT
NO
Oxygen is not considered a primary or secondary macronutrient. It is a non-mineral nutrient.
maybe
Carbohydrates are macronutrients.
Phosphorous is a macronutrient.
What_are_some_frequently_asked_nutrition_questions
It's neither.
It is impossible to be a fuel, because it does not have the correct properties to power an engine. Sugar could be considered a fuel for the body. Sucrose is an easily assimilated macronutrient that provides a quick source of energy. Sucrose, as a pure carbohydrate, has an energy content of 3.94 kilocalories per gram (or 17 kilojoules per gram).
no Macros are protein, carbs and fats
carbohydrate