Researchers discovered that folks can devour three every day servings of full-fat dairy with out adversely affecting physique weight, physique composition, power metabolism, or blood lipid ranges.
For years, folks scanning the dairy aisle have typically been steered towards skim milk and reduced-fat merchandise, largely as a result of full-fat dairy comprises saturated fats. But the well being results of dairy could rely upon greater than the quantity of fats listed on the label.
Analysis led by College of Toronto scientist Harvey Anderson discovered that adults may devour three servings of full-fat dairy every day with out dangerous modifications in physique weight, physique composition, power metabolism or blood lipid ranges. The outcomes have been printed within the Journal of Vitamin.
Testing full-fat dairy instantly
To look at the consequences underneath managed situations, Anderson and his colleagues recruited 74 adults with obese or weight problems and randomly positioned them into considered one of three dietary teams. One group adopted a low-dairy, calorie-restriction food plan. A second consumed three every day servings of dairy whereas protecting calorie consumption energy-neutral, which means members ate roughly the quantity of power their our bodies used. A 3rd group additionally consumed three every day servings however didn’t face calorie limits. All members have been inspired to comply with Canada’s meals information.
This design allowed the researchers to separate the consequences of dairy from these of calorie restriction. After 12 weeks, members consuming three servings of dairy confirmed no significant variations in weight acquire, physique composition or ldl cholesterol in contrast with these consuming the low-dairy food plan.
The upper dairy teams additionally recorded decrease blood strain and consumed extra calcium, protein and vitamin D, vitamins that assist capabilities corresponding to bone upkeep, muscle well being and immune exercise.
“Those that had three servings of dairy didn’t have hostile ranges of blood ldl cholesterol or lipids or proof of insulin resistance,” says Anderson, a professor of nutritional sciences in U of T’s Temerty Faculty of Medicine.
Insulin resistance occurs when the body’s cells stop responding properly to insulin, the hormone that helps move sugar from the bloodstream into cells for energy. Over time, that reduced response can increase the risk of type 2 diabetes.
Guidelines face conflicting evidence
Nutrition guidelines in Canada and many other countries have long favored fat-free or low-fat dairy. The reasoning is that reducing saturated fat may help prevent high cholesterol and lower cardiovascular disease risk.
Human research, however, has not consistently shown that eating full-fat dairy leads to worse health outcomes, Anderson says. Some investigations have even identified possible protective effects. Those include recent work led by Kozeta Miliku, an assistant professor at Temerty Medicine.
The apparent contradiction may come from viewing saturated fat in isolation rather than considering the food that contains it. Anderson and other researchers point to the dairy matrix hypothesis, which proposes that a food’s physical structure changes how its nutrients are broken down, absorbed and used.
In practical terms, dairy is not simply a collection of separate nutrients. Its proteins, fats, minerals and other components are packaged together, and that arrangement may influence how quickly they reach the body and what effects they produce.
“With dairy products, it’s got two proteins – casein and whey – that are bound together with fat and with nutrients mixed in,” Anderson says, adding that it’s this unique and complex physical structure that is responsible for the slow and steady delivery of nutrients from dairy products, and that expands their health impacts to more than just the sum of the isolated nutrients.
Whole foods reshape nutrition advice
The findings may be particularly useful for older adults, Anderson notes. As people age, their overall energy needs often decline even though they still require adequate protein, calcium, vitamin D and other nutrients.
That creates a practical challenge. Older adults may need to obtain more nutrition from fewer calories. Dairy products offer a familiar source of concentrated energy and nutrients, Anderson says, and the study found no evidence that including them increased the risk of diabetes or other chronic diseases.
The results also support a broader shift in nutrition research. Instead of judging foods mainly by a single component, such as saturated fat, researchers and policymakers may need to consider how nutrients behave when consumed together in a whole food.
Faced with constantly changing trends in food and nutrition and sometimes conflicting messaging around diet, Anderson’s advice is straightforward: “Keep it simple, eat a variety of foods and not too much of anything.”
Reference: “The Effect of Three Daily Servings of Full-Fat Dairy for 12 Weeks on Body Weight, Body Composition, Energy Metabolism, Blood Lipids, and Dietary Intake of Adults with Overweight and Obesity” by Gerald Harvey Anderson, Corrina Zi Chen Zhou, Shirley Vien, Marisa Soo, Shekoufeh Salamat, Maryam Akbarifakhrabadi, Larissa Chomka, Priya Kathirvel, Ferhan Siddiqi, Hrvoje Fabek and Bohdan Luhovyy, 22 January 2026, The Journal of Nutrition.
DOI: 10.1016/j.tjnut.2026.101373
This research was supported by Dairy Research Cluster 3 under the Canadian Agricultural Partnership AgriScience Program and the Mitacs Accelerate program.
Never miss a breakthrough: Join the SciTechDaily newsletter.
Follow us on Google and Google News.
