Consumption of milk containing A1 beta-casein is associated with increased gastrointestinal inflammation, digestive discomfort, delayed transit, and decreased cognitive processing speed and accuracy in individuals with self-reported intolerance.

“consumption of milk containing only a two beta casein versus milk containing both a 1 and a 2 beta casein proteins on GI physiology symptoms of discomfort and cognitive behavior of people with self-reported intolerance to traditional cow's milk it's a study from china or it's a chinese participants in the study and the conclusion is that cans consumption of milk containing a 1 beta casein was associated with increased GI inflammation or sending pd3 symptoms and the pd 3 symptoms are post daily digestive discomfort symptoms delayed transit decreased cognitive processing speed and accuracy”