For many years, health guidelines have directed consumers towards fat-free and low-fat dairy options, warning of the dangers of saturated fat in products like whole milk, cheese, and yogurt. The concern was that these fats could elevate cholesterol levels and damage heart health. However, recent research is challenging this longstanding advice.
A study conducted by Harvey Anderson, a professor at the University of Toronto, offers fresh insights. Published in The Journal of Nutrition, this research monitored adults who consumed full-fat dairy daily for 12 weeks. The results showed no adverse effects on weight, body fat, or cholesterol levels. Participants even reported some health improvements.
People consuming three servings of full-fat dairy each day did not exhibit significant weight gain or increased body fat. Their cholesterol and insulin resistance levels remained consistent compared to those following a low-dairy diet. Additionally, these individuals experienced better blood pressure and higher intake of calcium, protein, and vitamin D.
The Dairy Research Cluster 3, under the Canadian Agricultural Partnership AgriScience Program, supported this study.
‘More Than the Sum of the Isolated Nutrients’
Anderson explained that the structure of dairy products might be the reason behind these results. “Dairy contains two proteins, casein and whey, bound together with fat and nutrients,” he told Newsweek. This structure allows a slow and steady delivery of nutrients, enhancing health benefits beyond isolated nutrients.
Registered dietitian Jessica Corwin commented on the study for Newsweek, highlighting the need to reconsider traditional dietary advice. “For those raised in the fat-free era, we know how it affects cravings, satisfaction, and weight,” she said. Corwin noted that while the study doesn’t claim full-fat dairy is healthier than its low-fat counterpart, it does challenge the belief that full-fat products lead to weight gain or heart issues.
She emphasized the broader lesson about nutrition science, saying, “We can’t always predict a whole food’s health effects by focusing on one nutrient. Dairy, with its saturated fat, also offers high-quality protein, calcium, and potassium within a complex matrix…reminding us whole foods are often better than isolated supplements.”
Researchers recruited 74 overweight or obese adults and divided them into three groups. One followed a low-dairy, calorie-restricted diet. The second had an energy-neutral diet with three dairy servings daily. The third group had an unrestricted diet but also included three daily dairy servings. All participants adhered to Canada’s food guide, with the dairy groups provided full-fat products during the study.
Traditional dietary guidelines in Canada and beyond promoted low-fat dairy because of its links to high cholesterol and cardiovascular risks. Yet, the study supports the “dairy matrix hypothesis,” suggesting a food’s structure affects nutrient digestion and absorption more than its isolated components.
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