The a2 Milk Company: Feel the difference. Naturally contains A2 protein (The a2 Milk Difference: a2 milk comes from cows that naturally produce only the natural A2 protein and no A1. Published research suggests a2 milk may help avoid stomach discomfort in some people). Easier on digestion. May help some avoid discomfort. From cows not treated with growth hormone rBST (No significant difference has been shown between milk from rBST-treated and non rBST-treated cows). Real. We love our cows! Our cows are not treated with growth hormone rBST (No significant difference has been shown between milk from rBST-treated and non rBST-treated cows). Real. 100% real milk. True a2 Pledge: Our farms are Validus certified for animal welfare. Please recycle. recyclecartons.com.