Whale oil
The composition of whale oil varies with the species from which it was sourced and the method by which it was harvested and processed. Whale oil is mainly composed of triglycerides (molecules of fatty acids attached to a glycerol molecule). Oil sourced from toothed whales contains a substantial amount of wax esters (especially the oil of sperm whales). Most of the fatty acids are unsaturated. The most common fatty acids are oleic acid and its isomers (18:1 carbon chains).