As one of the most important branches of metabolomics, lipidomics has been a research hotspot in recent years. Lipids are an important class of compounds in living organisms. They are very different in structure, but have the same characteristics: they are insoluble in water, but soluble in non-polar organic solvents such as ether, chloroform and acetone.

Lipids are mainly divided into 8 categories: glycerides, polyethylenes, fatty acids, glycolipids, sterol lipids, pregnenolone lipids, glycerol phospholipids, sphingolipids