4Grain Omega 3 eggs offer 115mg of Omega 3 fatty acids, 200 mcg of Lutein and are a good source of Vitamin E . These eggs are produced by hens fed a wholesome diet of four "golden grains" enhanced with protein-rich soy. No hormones, antibiotics or animal by-products are used in our feed. 4Grain Omega 3 eggs are available in PET plastic cartons. Read more about PET plastic cartons by clicking here.