How many kilocalories are found per gram in fats?

Fats provide a significant source of energy, yielding approximately 9 kilocalories per gram. This high caloric value is due to the chemical structure of fats, which are composed of long chains of fatty acids. When metabolized, these fatty acids undergo a process called beta-oxidation and subsequent reactions in the citric acid cycle, leading to a greater release of energy compared to carbohydrates and proteins, which yield about 4 kilocalories per gram.

Understanding the caloric density of fats is crucial in nutritional science and cooking, as it influences dietary choices and energy balance in meal planning. Recognizing that fats are more energy-dense helps in managing caloric intake, whether for weight management or overall health.