What is the primary function of dietary fats?

The primary function of dietary fats is to provide energy. Fats are one of the three macronutrients essential to human nutrition, alongside carbohydrates and proteins. They are a dense source of energy, offering about 9 calories per gram, which is more than double that of carbohydrates and proteins, which offer about 4 calories per gram. This makes fats a vital source of energy for the body, particularly during prolonged physical activities or when the body is at rest.

Fats also play significant roles in supporting various bodily functions. They help in the absorption of fat-soluble vitamins (A, D, E, and K), contribute to cell membrane structure, and provide essential fatty acids that the body cannot synthesize on its own. However, among these various functions, their primary role is recognized as a major energy source.