What Is A2 Milk and Is It Healthy? Here’s What a Dietitian Says

If you love milk but hate feeling tummy troubles after drinking it, A2 milk may be a solution for you.

Milk is well-known for being a bone-building beverage that perfectly complements some freshly baked cookies. Many folks are used to seeing milk options that include terms like organic, lactose-free and grass-fed. But when taking a stroll down the dairy aisle, you may notice newcomers—specifically, dairy milks marketed as A2 milk. Naturally, seeing a unique label like “A2” begs curious minds to wonder what exactly A2 milk is and whether it is a healthy choice.

What Is A2 Milk?

A2 milk may sound like a new-wave, trendy milk option. But this natural dairy milk is just like the regular milk you know and love, but with one slight variation regarding the protein in this beverage.

Casein and whey are the two major proteins found in dairy milk, with casein making up approximately 30% of the protein content, per a 2021 review published in The Journal of Nutrition.