Welcome to my podcast. I am Doctor Warrick Bishop, and I want to help you to live as well as possible for as long as possible. I’m a practising cardiologist, best-selling author, keynote speaker, and the creator of The Healthy Heart Network. I have over 20 years as a specialist cardiologist and a private practice of over 10,000 patients.

Podcast Summary

Introduction: Dr. Warrick Bishop is a practicing cardiologist and author dedicated to educating patients about heart health and the latest advances in cardiac care. In this episode, he explores the difference between A1 and A2 milk proteins, examining the scientific evidence around whether A2 milk offers health advantages over the more commonly consumed A1 milk. The discussion covers the history of milk mutations, proposed mechanisms of difference, and the current state of research on this increasingly popular food debate.

Key Takeaways:

• A1 and A2 milk differ due to a mutation in beta casein that occurred approximately 8,000 years ago, with A1 milk becoming dominant in Western dairy industries through breeding practices.

• A1 beta casein may trigger the release of beta-casomorphin in the small intestine, which has been theoretically linked to altered gut function and increased inflammatory cells compared to A2 milk.

• Observational studies have suggested potential associations between A1 milk consumption and type 1 diabetes, autism, coronary artery disease, and schizophrenia, though causation has not been established.

• Many A2 milk studies have been funded by A2 milk producers, creating bias concerns, while independent research in 2014 failed to replicate health benefits claimed in company-sponsored studies.

• A 2017 randomized, double-blind crossover trial with 600 Chinese adults demonstrated that A2 milk reduced gastrointestinal symptoms like bloating and abdominal pain specifically in lactose-intolerant individuals.

• Currently, there is insufficient scientific evidence to recommend A2 milk over A1 milk for the general population, though lactose-intolerant individuals may experience benefits.

• Dr. Bishop recommends that people concerned about milk tolerance conduct self-blinded experiments comparing A1 and A2 over 24-48 hours to observe personal differences.

• A conflict of interest was discovered when a researcher who dismissed A2 milk claims in 2006 was later revealed to be a consultant for the New Zealand dairy industry.