Contents of conjugated linoleic acid isomers cis9,trans11 and trans10,cis12 in ruminant and non-ruminant meats available in the Italian market
Francesca M. Cicognini | Filippo Rossi | Samantha Sigolo | Antonio Gallo | Aldo Prandini
Conjugated linoleic acid (CLA) isomers are considered healthy factors due to their anticarcinogenic, anti-atherosclerotic and lipolytic effect. A recommended daily intake from 0.8 to 3 g CLA/day/person has been proposed to obtain biological effects in humans. The aim of this work was to provide data on <em>cis9,trans11</em> (<em>c9,t11</em> CLA) and <em>trans10,cis12</em> (<em>t10,c12</em> CLA) contents in meats collected from Italian largescale retail trade and completing a food CLA database. In a first trial, beef loin meats were characterised for label information available for consumers: origin (<em>i.e.</em>, Ireland, France- Italy, Piedmont) and sex of animals. No differences were observed for <em>c9,t11</em> and <em>t10,c12</em> CLA contents (mg/g fat) of loin meat from male or female. Piedmontese meat showed lower (P<0.05) <em>c9,t11</em> CLA level (mg/g fat) than Irish and French-Italian meats, whereas similar <em>t10,c12</em> CLA contents were measured in Piedmontese, Irish and French-Italian meats. Successively, meat samples from different animal species (male and female beef, veal, suckling lamb, belly beef, canned beef meat, pork and horse) were characterised for their contents in <em>c9,t11</em> and <em>t10,c12</em> CLA. Lamb meat had the highest (P<0.05) <em>c9,t11</em> CLA content (mg/g fat). The <em>c9,t11</em> CLA was lower than 2 mg/g fat in veal, pork and horse meats. Low <em>t10,c12</em> CLA amounts were found in all analysed meat samples. These data provided information to estimate the average daily intake of CLA from meats in an Italian cohort, which can be used in epidemiological studies.
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