A 12-week study of 74 adults suggests that consuming three servings of full-fat dairy daily does not negatively impact weight, body composition, or blood lipid levels.
Key facts
- •The 12-week study included 74 adults with overweight or obesity.
- •Participants consuming three servings of full-fat dairy daily showed no evidence of insulin resistance or adverse blood lipid levels.
- •The study was published in The Journal of Nutrition.
- •Dairy consumption was linked to improvements in blood pressure and increased intake of calcium, protein, and vitamin D.
- •The research was supported by the Dairy Research Cluster 3 and the Mitacs Accelerate program.
A new study led by University of Toronto professor Harvey Anderson indicates that full-fat dairy can be part of a healthy diet. The 12-week trial involving 74 adults found that consuming three servings of full-fat dairy daily did not lead to negative changes in body weight, body composition, or blood lipid levels. The findings, published in The Journal of Nutrition, challenge traditional dietary recommendations that favor low-fat or fat-free dairy products to reduce saturated fat intake.
By the numbers
Study Methodology and Findings
Researchers assigned 74 adults with overweight or obesity to one of three groups: a low-dairy calorie-restricted diet, an energy-neutral diet with three daily servings of dairy, or an unrestricted diet with three daily servings of dairy. Participants in the dairy groups were provided with full-fat products. After 12 weeks, researchers observed no meaningful differences in weight gain or cholesterol levels between the groups. Those consuming more dairy showed improvements in blood pressure and higher intake of calcium, protein, and vitamin D.
The Dairy Matrix Hypothesis
The study points to the 'dairy matrix hypothesis' to explain why the health effects of dairy may differ from predictions based solely on saturated fat content. This theory suggests that the complex physical structure of dairy—where proteins like casein and whey are bound with fat and other nutrients—influences how the body digests and absorbs nutrients. This structure may allow for a more gradual delivery of nutrients, potentially explaining why dairy does not show the expected negative health outcomes.
Implications for Nutrition
Professor Anderson suggests these findings are particularly relevant for older adults who may struggle to meet protein and nutrient needs while managing calorie intake. Dairy provides a familiar source of energy and essential nutrients that could help meet these requirements without increasing the risk of chronic diseases like diabetes. The research supports a shift toward evaluating whole foods rather than focusing on individual nutrients.
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This article was independently rewritten by ManyPress editorial AI from reporting originally published by ScienceDaily.
