Overview
- A University of Toronto trial that randomized 74 adults with overweight or obesity found that eating three servings of full‑fat dairy daily for 12 weeks produced no meaningful differences in weight, body composition, energy metabolism or blood lipid levels compared with a low‑dairy group.
- Participants assigned to the higher‑dairy arms showed modest improvements in blood pressure and higher intakes of calcium, protein and vitamin D, outcomes the researchers say could be important for older adults at risk of poor nutrition or bone loss.
- The study tests the dairy‑matrix idea, which holds that the way protein, fat, vitamins and minerals are combined in whole dairy foods may change how dairy saturated fat affects the body compared with isolated saturated fat.
- Nutrition experts warn the trial’s small sample and short 12‑week follow‑up limit how far its results can be generalized, and they note three servings of full‑fat dairy can quickly use up the typical 10% daily saturated‑fat cap in many diets.
- The finding rekindles debate over low‑fat dairy recommendations but does not yet provide a basis for policy change, and researchers say larger, longer trials are needed to settle how full‑fat dairy affects long‑term heart and metabolic risk.