All natural. American Culinary ChefsBest: 2009 Chefs Best Award, Best Taste. The ChefsBest Award for Best Taste is awarded to the brand rated highest overall among leading brands by independent professional chefs. Enjoy the flavor of always deliciously fresh President feta, thanks to our Savor Loc reclosable container. Our master cheesemakers use only the finest ingredients for this all natural feta. They also use milk from cows not treated with rBST. No significant difference has been shown between milk derived from cows treated with artificial growth hormone and those not treated with artificial growth hormone. Master's mark Wisconsin.