Fats, also known as lipids, serve several critical functions in the body:

• Energy Storage: Fats are the primary way the body stores energy. They are a concentrated source of energy, providing more than twice the energy per gram compared to carbohydrates or proteins.
• Insulation and Protection: Fat helps insulate the body, maintaining core body temperature. It also cushions and protects vital organs.
• Hormone Production: Fats are essential for producing hormones, including steroid hormones like estrogen and testosterone, which regulate various bodily functions.
• Cell Structure: Fats are a key component of cell membranes, providing structure and flexibility.
• Nutrient Absorption: Certain vitamins (A, D, E, and K) are fat-soluble, meaning they require fat to be properly absorbed by the body.
• Brain Function: Fats, especially omega-3 fatty acids, are crucial for brain development and function.

For more detailed information, you can refer to these resources:

• Harvard T.H. Chan School of Public Health - Fats and Cholesterol
• National Center for Biotechnology Information (NCBI) - Lipids