What is one of the main functions of fats in the body?

Fats play several vital roles in the body, and one of their primary functions is to store and use energy. This aspect is significant because fats are densely packed sources of energy, providing more than double the calories per gram compared to carbohydrates or proteins. The body stores excess energy as fat, which can be utilized during times of fasting or extended physical activity.

In addition to energy storage, fats also help in insulating the body, protecting internal organs, and aiding in the absorption of essential fat-soluble vitamins (A, D, E, and K). While insulating the body is indeed one of the roles that fats play, the primary and vital function in terms of energy management and overall metabolism leans towards storing and utilizing energy effectively.