A2 milk differs from regular milk mainly in its beta-casein protein type: A2 milk contains only A2 beta-casein, while regular milk usually contains a mix of A1 and A2 proteins. Some research suggests A1 protein may break down into peptides that can cause digestive discomfort (like bloating, gas, or heaviness) in sensitive individuals, while A2 milk is digested more smoothly and may produce fewer gut-related symptoms for some people. However, both still contain lactose, so A2 milk is not suitable for people with true lactose intolerance, but it may help those who feel “dairy-sensitive” rather than lactose-intolerant. The potential benefit comes from its different protein structure, which may be easier on gut enzymes and reduce inflammatory or digestive responses in some people. Overall, A2 milk may improve comfort for certain dairy-sensitive individuals, but results vary and it is not a cure for dairy intolerance.