Nutrition Conversations · The Canadian Nutrition Society

New perspectives on the role of dairy in type 2 diabetes with Dr. Anthony Hanley

·40 min·3 clips

Dr. Hanley explains why yogurt has the strongest protective effect against type 2 diabetes in long-term studies.

Dr. Anthony Hanley, a professor and diabetes researcher, joins host Dr. Shirin Panahy to examine the relationship between dairy consumption and type 2 diabetes risk. This episode, sponsored by Dairy Farmers of Canada, explores the scientific evidence from various study designs. Dr. Hanley's research is supported by organizations including Diabetes Canada and the Canadian Institutes of Health Research. Type 2 diabetes constitutes 80-90% of global diabetes cases and is linked to aging and increasing adiposity. Observational studies, which track large populations over long periods, use meta-analysis to combine findings from multiple individual studies. These meta-analyses consistently show total dairy consumption has at least a neutral, and often an inverse, association with diabetes risk. When examining dairy by fat content, low-fat dairy shows a clear inverse association, while high-fat dairy appears neutral. Analyzing dairy by its food matrix reveals yogurt consumption has the strongest and most consistent inverse association with diabetes risk. Cheese also shows an inverse association, though the data is less consistent, and milk findings are generally inverse as well. Paradoxically, some meta-analyses indicate regular ice cream consumers have a lower diabetes risk, a finding Dr. Hanley notes is mysterious. The protective signal for yogurt in observational studies might be modestly understated because most research does not differentiate between sweetened and unsweetened varieties. Randomized controlled trials on dairy and diabetes are more challenging to conduct and have produced inconsistent results on intermediate markers like blood glucose and insulin resistance. Unique exogenous fatty acids found in dairy fat serve as useful biomarkers for intake in research and are themselves associated with a lower diabetes risk in pooled analyses. Dr. Hanley suggests future research should investigate dairy's impact on non-alcoholic fatty liver disease and adipose tissue biology. He emphasizes that the source of saturated fat matters, with dairy sources showing limited risk compared to other sources. The overall tone is educational and conversational, focusing on explaining epidemiological concepts and nuanced research findings. Listeners interested in nutritional epidemiology, public health dietary guidance, or the science behind food and chronic disease will find this episode valuable. Those seeking definitive, simple answers or dismissive of observational research may find the discussion too measured or complex.

As heard by us

A careful look at dairy and type 2 diabetes, with a useful note on yogurt and measurement limits.

The episode takes on a familiar nutrition question and treats it with care, weighing evidence against measurement and resisting the urge to turn association into certainty. Dr. Sharon Panahy and Dr.

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For a measured take on dairy, yogurt, and type 2 diabetes risk, press play.

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