acid accounts for 60% of the TFAs in animal fat, it typically represents less than 20% of industrially produced TFAs. During partial hydrogenation of vegetable oils various octadecanoic acid isomers such as elaidic (trans-9 18:1) or trans 10 18:1 acids are formed, but these isomers are present at much lower concentrations in ruminant fat. Conjugated linoleic acids (CLA) consist of a mixture of several positional and geometric isomers whose double bonds can be either trans or cis configuration. The cis-9,trans-11 isomer (sometimes referred to as rumenic acid) is the most abundant form found in food, the trans-10,cis-12 isomer being the second most abundant form. Dairy products may account for up to about 75% of total food intake of CLA and ruminant meats account for the other 25%.
acid accounts for 60% of the TFAs in animal fat, it typically represents less than 20% of industrially produced TFAs. During partial hydrogenation of vegetable oils various octadecanoic acid isomers such as elaidic (trans-9 18:1) or trans 10 18:1 acids are formed, but these isomers are present at much lower concentrations in ruminant fat. Conjugated linoleic acids (CLA) consist of a mixture of several positional and geometric isomers whose double bonds can be either trans or cis configuration. The cis-9,trans-11 isomer (sometimes referred to as rumenic acid) is the most abundant form found in food, the trans-10,cis-12 isomer being the second most abundant form. Dairy products may account for up to about 75% of total food intake of CLA and ruminant meats account for the other 25%.