To provide a method for preparing edible products for animals, by blending into a food substance with Thraustochytriales, -3 highly unsaturated fatty acid produced by Thraustochytriales and microflora selected from the group of mixtures thereof.

The food product is prepared, by adding to a food substance with Thraustochytriales, -3 highly unsaturated fatty acid produced by Thraustochytriales, microflora selected from the group of mixtures thereof, or -3 highly unsaturated fatty acid produced by the microflora. In the embodiments, the food products are for animals and for humans, and in the preferred cases, an antioxidant is added to these food products. As a representative for group, Thraustochytrium, Schizochytrium, and -3HUFA produced from Thraustochytrium, and the like, can be cited.