Was Conjugated LA from Dairy Products Missing in Prehistoric Times?
We have already discussed conjugated linoleic acids (CLA) here several times. Unlike ordinary linoleic acid (C18:2n-6), CLA are also C18:2 fatty acids, but they differ in the spacing of the double bonds along the carbon chain—they are closer together. They can also have different combinations of trans and cis double bonds. What they have in common is that they are less stable than linoleic acid and are more susceptible to peroxidation . They are therefore better sensors of oxidative stress. They more accurately reflect the state of metabolism and respond more sensitively to metabolic disturbances, breaking down more readily into various signaling molecules. The most common source of CLA in our diet is milk fat. However, our bodies can also produce CLA from trans-vaccenic acid (TVA) , which is also present in milk. There are animal studies showing that as little as 1% of calories from CLA in mice completely eliminates arterial plaque and restores fat metabolism , protects the liver , a...