The phrase "animal sources" refers to things that come directly from animals, such as meat, milk, eggs, or other products that are made from or produced by animals. Full definition
And it's important to avoid foods with added sugars, saturated fats (fat from animal sources of food), or trans fats. (bostonmamas.com)
All are essential, and best absorbed from eating animal sources of saturated fats rich in these vitamins (best sources are grass fed animals and wild seafood). (blogs.discovermagazine.com)
Most protein is found in animal sources such as poultry, meat, eggs, and dairy. (mealpreponfleek.com)