Lipids, encompassing both plant and animal molecules, are crucial components with diverse roles in biological systems. These molecules are highly efficient energy sources, providing approximately 39.5 kJ per gram, making them vital for sustaining metabolic activities. Apart from their energy reserve function, lipids play essential roles in constructing cell membranes, acting as both inter- and intracellular messengers, and serving as metabolic substrates. In comparison to carbohydrates and proteins, lipids offer a significantly higher energy yield, highlighting their importance in human nutrition. This paper provides an overview of the multifaceted properties and functions of lipids, emphasizing their critical role in supporting various physiological processes and their significance in human dietary intake
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