As a continuation of a question of most adults being lactose intolerant, the marketing of The a2 Milk Company in Australia House at SxSW 2018 suggested it may not be lactose-intolerance, after all, but instead the sensitivity to the A1 protein found in cow's milk prevalent within certain countries that's causing the milk-drinking discomfort issues.
Looking for milk for Lactose Intolerance? Did you know that some people who experience lactose intolerance symptoms might actually be sensitive to A1 protein?
Many people, even trained healthcare professionals, assume if they have discomfort after drinking milk that they’re lactose intolerant without being tested to make sure. But research suggests that only about 5-7% of these cases can be attributed to Lactose Intolerance!
Is this really true?! Only 5-7% of lactose intolerance diagnoses are correct?! This would appear to be a very disruptive phenomenon on misclassification of the vast majority of the population, yet Wikipedia articles on Lactose intolerance and A2 milk, for example, make no mention of any of this, and instead the latter article goes into lengths of how The a2 Milk Company has unsuccessfully tried to lobby various governments for warning labels for non-A2-milk around unrelated and unproven long-term health effects of A1 vs. A2 milk.
Moreover, as a followup question, if it's really true that we're all not lactose-intolerant, after all, then where's the rationale for the lactase enzyme supplements and LACTAID® milk seemingly addressing the associated discomfort issues of the generic milk?!