In regards to energy reserves, how do fats compare to carbohydrates?

Fats offer more energy per gram than carbohydrates, making them a more concentrated source of energy for the body. Specifically, fats provide approximately 9 calories per gram, while carbohydrates provide around 4 calories per gram. This significant difference in caloric content means that fats are more efficient in storing energy, which is particularly beneficial for the body during prolonged periods of activity or in times of fasting.

In addition to their energy density, fats also play crucial roles in the body, such as providing insulation, protecting vital organs, and aiding in the absorption of fat-soluble vitamins. While carbohydrates are generally utilized as the primary energy source during high-intensity activities due to their quick availability, fats serve as an important energy reserve, especially during lower-intensity, long-duration exercises.

Understanding the comparative energy yield of these macronutrients highlights why dietary fats are essential for maintaining energy balance and supporting metabolic processes in the body.