Nerve tissue is rich in gangliosides, glycolipids built from a fatty acid, most often stearic acid, plus an oligosaccharide of hexose and sialic acid residues, all anchored to a sphingosine backbone. Their highest concentrations sit in the central nervous system, where they mediate cell recognition and signalling. Food scientists encounter them in dairy ingredients derived from milk fat globule membranes, and nutrition research probes their role in infant brain development. Analytical work profiles them by mass spectrometry, mapping the sialic acid patterns that define each ganglioside class.