Which macronutrient has the highest caloric content per gram?

Fats contain the highest caloric content per gram, providing approximately 9 calories per gram. This is significant because both carbohydrates and proteins provide about 4 calories per gram, while alcohol contributes approximately 7 calories per gram. The higher caloric density of fats is due to their molecular structure and how they are metabolized in the body. This characteristic makes fats a concentrated source of energy, which is especially useful in situations requiring sustained energy supply, such as endurance sports.

In terms of dietary balance, understanding that fats yield more energy per gram than the other macronutrients is crucial for athletes and those involved in sports medicine. It highlights the importance of including healthy fats in one's diet to support energy needs during training and competition.