Fatty acids have several crucial biological, functional, and structural roles in the human body. The most important functions of fatty acids include: 

• Major source of energy storage and provision – Fatty acids store excess dietary carbohydrates as triacylglycerol in adipose tissue. When needed, the fatty acids from triacylglycerol are released to provide energy for various activities. 
• Formation of healthy cellular membranes – Fatty acids impart the cell membranes with critical flexibility, fluidity, and permeability to ensure their smooth functioning. They also promote passive transport of molecules through the cellular membrane. 
• Ensure proper development and functioning of the brain and nervous system
• Regulation of intracellular signaling pathways 
• Hormone production and regulation
• Regulation of immune and inflammatory responses, blood clotting, and liver function
• Regulation of transcription factor activity and gene expression
• Transport and breakdown of cholesterol
• Support skin and hair health