For years, low-fat dairy dominated nutrition guidance — but a rigorous new trial suggests the trade-off may not be necessary. Researchers at the University of Toronto found that adults who ate three daily servings of full-fat dairy for 12 weeks showed no meaningful changes in body weight, body fat, cholesterol, or insulin resistance, while significantly improving key nutrients in their healthy meal plan.
What the Study Found
The trial enrolled 74 adults with overweight or obesity, randomly assigned to three groups: a low-dairy group with calorie restriction, an energy-neutral group eating three daily dairy servings, and an unrestricted group also eating three servings. After 12 weeks, the dairy groups showed improved blood pressure and higher intake of calcium, protein, and vitamin D — nutrients commonly undereaten in Western diets — with no adverse effects on blood lipids or insulin resistance, according to ScienceDaily. The findings were published in The Journal of Nutrition (Volume 156, Issue 4).
What This Means for Meal Planning
The study, led by Professor Harvey Anderson of the University of Toronto’s Temerty Faculty of Medicine, challenges the longstanding advice to choose low-fat over full-fat dairy. Dairy’s complex food matrix — its unique combination of fats, proteins, and minerals — appears to behave differently in the body than isolated saturated fat. For practical meal planning, the results suggest that including full-fat options like cheese, whole-milk yogurt, or regular milk can strengthen the nutrient profile of a daily diet without compromising weight or cardiovascular markers.
What’s Next
The research adds to a growing body of evidence calling for a more nuanced view of dairy fat. Future studies will need to examine longer durations and specific dairy types, but for now the 12-week trial gives dietitians and health-conscious eaters a clearer basis for including full-fat dairy as part of a balanced, whole-food diet.