The PDO
Regulating Councils and the Iberian pork industry have drawn up
quality control programmes to determine and guarantee animal
feeding regimes, based on on-farm inspection of the animals themselves
and analysis of fatty acid (FA) composition in subcutaneous
fat by gas chromatography (Garrido-Varo & De Pedro, 2007), because
the feeding regime of the animal is directly related with
the type and amount of the fatty acid in the resulting profile.