Lactose intolerance fact or fiction?

“The majority of people who experience symptoms of milk intolerance would not actually be clinically diagnosed as lactose intolerant.”


NIH Consensus Statement on Lactose Intolerance and Health, 2010

Results of a new clinical trial show that the A1 protein in cows’ milk may trigger symptoms of lactose intolerance.

Published in the respected UK based Nutrition Journal, the study is the first human based research to test the effects of the A1 versus A2 protein types found in cows’ milk on participants with clinically diagnosed lactose intolerance[1]. The research reported that:

  • Many participants were able to drink a2 Milk® even though it contains lactose.
  • Symptoms of lactose intolerance can be triggered by the A1 protein found in regular cows’ milk.
  • No increase in digestive issues when participants drank a2 Milk®, which is naturally free from the A1 protein.
  • The extent of lactose intolerance could be overstated and GI symptoms may in some cases actually be a result of an inflammatory response in the gut caused by the A1 protein.


Professor Sun Jianqin, the lead researcher says:

“These are breakthrough findings for those who believe they suffer from lactose intolerance, and I am one of them. It suggests that milk that only contains the A2 type protein has a natural affinity with the human body and digestion.”

More details about the study can be found on our Health Care Professionals page

a2 Milk® could be the solution for millions as it is naturally A1 protein-free

a2 Milk® is from specially selected cows that contain only the A2 protein, so it’s the original milk. Just like nature intended.

This research is significant for the majority of people who have avoided milk for so long and blamed lactose intolerance as being the issue. For many people, they can now enjoy the nutritional benefits of a2 Milk® with confidence.

Milk for Lactose intolerance

See what happens inside your body

[1] 23 of 45 study participants demonstrated lactase deficiency by urinary galactose (U-Gal) test with corresponding symptoms of lactose intolerance measured

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