New study suggests that lactose intolerance could be a myth for many

The extent of lactose intolerance could be a myth and the symptoms most likely the result of an inflammatory response to the A1 protein found in conventional cows’ milk, according to new clinical research conducted in China, where the levels of lactose intolerance – the highest known in the world – make the population a good model for the beneficial effect of regular vs. milk containing only the A2 beta-casein protein. 

Published in the UK based Nutrition Journal, the study led by Professor Sun Jianqin from Huadong Hospital, an affiliate of the prestigious Fudan University in Shanghai, compared the impact of those that drank conventional cows’ milk – milk with the A1 protein – to that of a2 Milk™.

a2 Milk™ is from cows specially selected because they produce milk that contains only the A2 protein type and naturally does not contain the A1 protein.

This research is the first human-based research testing the effects of the A1 versus A2 protein types on participants, half of whom were clinically confirmed as having issues with lactose digestion. The trial found that a2 Milk™ caused no gastrointestinal disturbance in any study participants – most tellingly, including those confirmed to have issues digesting lactose.

Those who drank conventional cows’ milk compared to a2 Milk™ experienced elevated gastro-intestinal inflammation, stool transit delays and elevated markers for inflammation and immune response. When the participants drank a2 Milk™ it was significantly gentler on their digestive system with less inflammation associated with bloating and abdominal pain.

Individuals in the trial who drank milk containing only the A2 protein type also had a faster response and lower error rate in cognitive function tests than those who drank regular milk containing the A1 type protein.

This is consistent with emerging science demonstrating a clear link between digestive health and brain function.