Typical eggs have as much PUFA as canola oil. When trying to deplete PUFA stores on the body, especially linoleic acid, this gets in the way.
There is small cottage industry attempting to rewind the profile of fatty acids in chicken and pork products 1000 years.
You have to explicitly source it. Corn +soy free is not enough. Has to be low pufa feed, which is basically non-existent.
