What are the functions of lipids?

• A. Protects and insulates vital organs, skin lubrication, transports, satiety (feeling full) and taste
• B. They provide energy and nothing else
• C. They are never involved in transport of nutrients
• D. They are water-soluble

Answer: (A)

Lipids serve multiple essential roles beyond simply providing energy. They cushion and protect vital organs and help insulate the body, while subcutaneous fat also contributes to warmth. Lipids keep skin and hair lubricated through sebum, and they are key for transport processes—lipids move through the bloodstream via lipoproteins and are required for the absorption and transport of fat-soluble vitamins. They also influence satiety and flavor, helping you feel full after meals and adding texture and taste. So the option that lists protection, insulation, skin lubrication, transport, and effects on fullness and taste best captures the broad functions of lipids. In contrast, lipids do more than energy alone, they are not water-soluble, and they are indeed involved in transport of nutrients.