Neutral lipids are normally associated with which purpose energy storage. Neutral lipids are hydrophobic molecules lacking charged groups which are produced by the dehydration synthesis of one or more fatty acids with an alcohol like glycerol. The examples of neutral lipids are triacylglycerols or sterol esters. Those lipids cannot be incorporated into biomembranes, so they are “packed” in structures called lipid particles (lipid droplets). Upon requirement storage lipids are mobilized from this compartment and degradation products serve as energy sources and/or building blocks for membrane formation.