Do you have patients who experience symptoms of digestive discomfort after consuming dairy? Patients who struggle to digest dairy could be lactose intolerant or, in some cases, experience a sensitivity to a protein found in cows’ milk called A1 beta-casein. Leading gut health expert and dietitian Andrea Hardy joins us in this podcast to delve into the science behind this condition. She also highlights the difference between lactose intolerance and lactose maldigestion, and explains the key interventions dietitians can use with their patients who cannot tolerate dairy.


Andrea Hardy is a registered dietitian and one of Canada’s leading Gut Health Experts. Having endured her own journey with an IBS diagnosis, Andrea is on a mission to communicate credible scientific information about nutrition, gut health and digestive disorders in a way that is easy to consume and inspires sustainable action.


In this episode, we discuss:

  • How Andrea’s personal experience with IBS led her to become a leading gut health dietitian
  • Some of the common reasons people may not tolerate dairy products
  • The symptoms people may experience after consuming dairy
  • The latest research around lactose intolerance vs A1 beta-casein sensitivity
  • How to determine an individual’s tolerance to milk containing only the A2 protein


Simon Brooke-Taylor, Karen Dwyer, Keith Woodford, Natalya Kost, Systematic Review of the Gastrointestinal Effects of A1 Compared with A2 β-Casein, Advances in Nutrition, Volume 8, Issue 5, September 2017, Pages 739–748,

Davor Daniloski, Nathan M.D. Cunha, Noel A. McCarthy, Tom F. O’Callaghan, Sinéad McParland, Todor Vasiljevic, Health-related outcomes of genetic polymorphism of bovine β-casein variants: A systematic review of randomised controlled trials, Trends in Food Science & Technology, Volume 111, 2021,Pages 233-248,

He M et al. Nutrition Journal 2017. 16:72.

Jianqin S et al. Nutrition Journal 2016. 15:35.

Sheng et al Journal of Pediatric Gastroenterology 2019.

Ramakrishnan M et al. Nutrients 2020.12:3855.

Milan et al. Am J Clin Nutr. 2020. 1;111(1).

This podcast is not, and is not intended to be, medical advice, which should be tailored to your individual circumstances. This podcast is for your information only, and we advise that you exercise your own judgment before deciding to use the information provided. Professional medical advice should be obtained before taking action.  Please see here for terms and conditions.


Supported by The a2 Milk Company as part of Gut Health Month

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