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Medicine

Core Concepts in Nutrition

Quick fact

The three macronutrients—carbohydrates, proteins, and fats—each provide energy, but your body uses them in completely different ways, and you can survive without any one of them for a while, but not without all three.

Why this is interesting

You eat every day, but do you know exactly what your body is doing with that food? The answer involves a surprisingly simple set of core concepts that can transform how you think about every meal.