The aim of this work was to characterise and compare the lipid cQmposition (lípid and eholcsterol contents, fatty acid composition and conjugated linoleie acid isomers) and nutritiona! value (PUFA/SFA and n-6/n-3 ratios) of four Portuguese mea!s with Protceted Designation of Origin (POO; Camalentejana-PDO beel: Mertolenga-POO beef, Barrosã-POO veal and Arouquesa-POO veal), in 1\\'0 distinct slaughter seasoos (e...