The three key nutrient groups (also called 'macronutrients') are:

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The three key nutrient groups (macronutrients) are proteins, carbohydrates, and fats. These are essential for providing energy, repairing and building tissues, and regulating bodily functions. Fiber and sodium are considered micronutrients and while important, they do not fall into the category of macronutrients. Water is also important, but not considered a nutrient group. Calories are a measure of energy obtained from macronutrients and not a macronutrient itself.

The Three Key Nutrient Groups (Also Called 'Macronutrients') Are