Science library study

Effects of cow's milk beta-casein variants on symptoms of milk intolerance in Chinese adults: a multicentre, randomised controlled study

A randomized crossover trial in 600 adults with milk intolerance. Milk with only A2 beta-casein caused significantly less bloating, pain, and loose stool than ordinary A1/A2 milk, and the benefit held even in people who could digest lactose, pointing to dairy protein, not just lactose, as a trigger.

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