trans,trans-2,4-Decadienal is a lipid peroxidation product of linolieic acid.In Vitro: Two metabolic pathways for the biotransformation of trans,trans-2,4-Decadienal (tt-DDE) in vivo are proposed: (i) the oxidation of tt-DDE to the corresponding carboxylic acid, 2,4-decadienoic acid, in liver cells and (ii) glutathione (GHS) conjugation, GSH breakdown, and aldehyde reduction, which generate cysteine-conjugated 2,4-decadien-1-ol in both liver and lung cells.