release a compound called BCM-7 (beta-casomorphin-7). "BCM-7 may contribute to digestive symptoms like gas and cramping," she explains. "A2 protein doesn't produce BCM-7, which may make it easier to digest for some people." Lagrange also notes that the difference between A1 and A2 beta-casein is a single amino acid. "This small variation influences how the protein is digested," she says. Some researchers believe that difference could help explain why A2 milk might be better tolerated by certain individuals. However, the evidence isn't definitive yet. "The positive results seen in animal studies haven't always translated into human trials," Lagrange points out. A 2017 review found limited evidence that A1 milk might slow digestion or cause looser stools, but a more recent 2022 studY. found only modest benefits for A2 milk in human subjects, so more research is still needed.
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Is A2 milk lactose-free?
No, just because a milk is A2 doesn't mean it's lactose-free. Lactose is a naturally occurring sugar in milk, and A2 milk contains it just like regular milk. A2 milk won't help if you are lactose intolerant, but Lagrange adds that lactose-free versions of A2 milk are now
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