
The a2 Milk® Difference
a2 Milk® is 100% natural cow’s milk, but with one important difference.
Unlike ordinary cow’s milk, a2 Milk® is sourced from cows that naturally produce milk containing only A2-type protein, and no A1. Cows are specially selected using a simple genetic test.

Approximately 30% of the proteins in cows’ milk are called beta-casein. These proteins can be grouped into two types: A1 and A2-type based on a slight difference in their amino acid structure.
It is this difference that under normal digestive conditions causes A1 and A2-type proteins to be digested differently in the stomach in some people.

The USDA Dietary Guidelines for Americans (DGA) recommend dairy as an excellent source of protein, healthy fats, vitamins and minerals.1 According to the 2025-2030 DGA Scientific Report, only about 12% of Americans meet the dairy intake recommendations.2 This may be due to a variety of factors, including self-reported milk intolerance and/or digestive discomfort with consumption of ordinary cow's milk.
A growing body of clinical research suggests that for some people, the A1 protein in ordinary cows’ milk may be the cause of these digestive issues. a2 Milk® naturally contains only A2-type protein and no A1. Some people who find that they experience digestive discomfort after drinking ordinary cow’s milk may be able to consume a2 Milk® and experience less digestive discomfort, meaning more people may be able to enjoy the nutrition and health benefits of cow’s milk.
Reference
[1] U.S. Department of Health and Human Services & U.S. Department of Agriculture. (2026). Dietary Guidelines for Americans, 2025–2030 (PDF). https://cdn.realfood.gov/DGA.pdf
[2] U.S. Department of Health and Human Services & U.S. Department of Agriculture. (2024). Scientific Report of the 2025 Dietary Guidelines Advisory Committee (Part D, Chapter 1, p. 12). https://www.dietaryguidelines.gov/sites/default/files/2024-12/Scientific_Report_of_the_2025_Dietary_Guidelines_Advisory_Committee_508c.pdf