How many calories per gram does fat provide?

Fat provides 9 calories per gram, which is significantly higher than the caloric content of carbohydrates and proteins. This higher energy density is due to the chemical structure of fats, which contain long hydrocarbon chains that store energy. As a macronutrient, fat plays several essential roles in the body, including serving as a source of sustained energy, aiding in the absorption of fat-soluble vitamins (like vitamins A, D, E, and K), and contributing to the structural integrity of cell membranes. The recognition of fat's energy-providing capacity is crucial for meal planning and energy balance in nutritional strategies. Understanding this concept is vital for anyone working in sports nutrition, as it influences dietary recommendations for athletes and active populations to optimize their energy intake and performance.