Study Links Dairy Products to Cardiovascular Health Benefits

Overview of the Research

A recent Canadian study published in The Lancet explored the relationship between dairy consumption and cardiovascular disease, as well as mortality rates. The findings suggest that the health benefits of dairy products may be underestimated.

Common Dietary Advice

You may have frequently encountered recommendations to eliminate butter from your lobster-dipping sauce or to opt for skim milk in your coffee. Such advice often comes from nutritionists or well-meaning friends and family, who advocate for low-fat dairy options over whole-fat varieties like milk, yogurt, butter, and cheese.

Concerns About Saturated Fats

This dietary guidance primarily stems from the belief that dairy products are significant sources of saturated fats, which could potentially elevate lipid and cholesterol levels, leading to an increased risk of cardiovascular diseases and mortality.

New Perspectives from McMaster University

Contrary to conventional wisdom, researchers from McMaster University conducted a study that challenges these assumptions. Their investigation focused on the health impacts of dairy products including yogurt, cheese, and milk.

Study Design and Findings

The research analyzed data from approximately 130,000 individuals aged 35 to 70 from 21 countries across five continents. Participants reported their consumption of whole-fat and low-fat dairy through questionnaires. This data was part of The Prospective Urban Rural Epidemiology (PURE) study, where participants were followed for up to nine years or until death from natural causes or heart disease occurred.

The study revealed that consuming three servings of whole-fat milk or yogurt daily is associated with cardiovascular health benefits and a reduced risk of stroke and mortality. Notably, no correlation was found between higher dairy intake and heart attack incidents.

Implications for Dietary Guidelines

The authors of the study emphasized that their findings support the notion that dairy products may positively influence mortality and cardiovascular health, particularly in low- and middle-income countries where dairy consumption is traditionally lower.

They also highlighted that current dietary guidelines favor fat-free or low-fat dairy due to concerns about the effects of saturated fatty acids on LDL cholesterol levels. However, the researchers argue that since dairy encompasses a wide variety of products, its health impacts cannot be solely evaluated based on saturated fat content.

Study Limitations and Future Research

A significant limitation identified in the study was the lack of oversight regarding participants’ reported dairy consumption. Nevertheless, the research suggests that dairy could contribute to a lower risk of cardiovascular disease and mortality. While these findings warrant further investigation, you may find yourself less guilty when choosing your favorite whole-fat yogurt in the future.

Reference

Dehghan M, Mente A, Rangarajan S, Sheridan P, Mohan V, Iqbal R et al. Association of dairy intake with cardiovascular disease and mortality in 21 countries from five continents (PURE): a prospective cohort study. The Lancet. 2018.