Since 1904. Lucerne farmers pledge - milk from cows not treated with growth hormone rBST (The FDA states that no significant difference has been shown between milk derived from rBST treated cows and non-rBST treated cows). Ultra-pasteurized to last longer unopened. For best quality use within 7 days after opening. Tastes fresh longer. From Lucerne to your family. Lucerne has proudly provided American families with wholesome, farm-fresh milk since it was established as a dairy farmers' cooperative over one hundred years ago in 1904. Our family of fine Lucerne dairy products also includes a wide variety of butter, cheese, yogurt and ice cream, all with the same attention to quality and great taste you can depend on Lucerne to deliver. From the farm to your family, Lucerne is your natural choice. Thank you for selecting Lucerne. Grade A. Ultra-pasteurized. Homogenized. Product of USA.