lipid ketone body pubmed:22259088 A carbonyl compound produced as a water-soluble byproduct when fatty acids are broken down for energy in the liver. There are three endogenous ketone bodies: acetone, acetoacetic acid, and (<i>R</i>)-3-hydroxybutyric acid; others may be produced as a result of the metabolism of synthetic triglycerides. pubmed:23466063 pubmed:22268909 pubmed:23396451 wikipedia.en:Ketone_body CHEBI:73693 chebi_ontology pubmed:23082721 pubmed:22524563 pubmed:23557707 pubmed:10634967 ketone bodies pubmed:22879057 pubmed:23148246 pubmed:19159745