Questions: A. Do foods contain only one type of fat? B. What are the roles of fat in the body?

A. Foods do not contain only one type of fat. Most foods contain a mixture of different types of fats, including saturated, monounsaturated, and polyunsaturated fatty acids. For example, olive oil is primarily composed of monounsaturated fats but also contains small amounts of saturated and polyunsaturated fats. Similarly, butter contains a mix of saturated and unsaturated fats. The proportions of these fats vary depending on the food source.

B. Fats play several important roles in the body:

1. Energy Source: Fats are a dense source of energy, providing 9 calories per gram, which is more than double the energy provided by carbohydrates or proteins.

2. Nutrient Absorption: Fats are essential for the absorption of fat-soluble vitamins (A, D, E, and K) and other fat-soluble nutrients.

3. Cell Structure: Fats are a critical component of cell membranes, providing structural integrity and fluidity.

4. Insulation and Protection: Fats help insulate the body and protect vital organs by providing a cushioning effect.

5. Hormone Production: Fats are involved in the synthesis of hormones, including steroid hormones and prostaglandins, which are important for various physiological processes.

6. Satiety and Flavor: Fats contribute to the feeling of fullness after meals and enhance the flavor and texture of foods.