How many calories are in a gram of fats?

Fats are a macronutrient that provides a significant amount of energy for the body. Each gram of fat contains approximately 9 calories, making it the most calorie-dense macronutrient compared to carbohydrates and proteins, which each provide 4 calories per gram. This higher energy content is due to the chemical structure of fats, which allows for more energy to be stored in the form of bonds between carbon and hydrogen atoms. Thus, when considering energy sources, fats are an essential component of a balanced diet, contributing to overall energy intake and supporting various bodily functions such as hormone production, cell structure, and nutrient absorption. Understanding this caloric value is crucial for anyone studying nutrition, as it helps with dietary planning and management.