Ultra-pasteurized. Our Farmers' Pledge: Does not contain artificial growth hormones. Since 1933. Byrne Dairy Milk is mighty fine, gives you vitamin D when the sun doesn't shine, so drink a bottle whenever you dine, and you'll always be a friend of mine! Grade A. Real. Smart Fact: Excellent source of calcium. www.byrnedairy.com. Please recycle. FDA has found no significant difference from milk derived from rBST treated cows and those not treated. Made in the USA.