Plant-Based Diet and Heart Health -

For decades, experts have promoted low-fat diets as the key to preventing heart disease. But newer research suggests that focusing on whole, plant-based foods could offer even stronger protection–especially over the long term. Keep reading to learn how a predominantly plant-based diet and heart health go hand in hand, and how you can enjoy the benefits without giving up all your favorite animal-based foods.Key takeaways:

A plant-centered diet reduced heart attack and stroke risk in a 30-year study.
Low-fat diets lowered cholesterol but didn’t offer the same protection.
Recent research questions the long-standing link between saturated fat and heart disease.
Experts recommend focusing on whole, plant-based foods rather than simply cutting fat.

Plant-based Diets and Heart Disease

In a massive, long-term study called Coronary Artery Risk Development in Young Adults (CARDIA), researchers found that both low-fat and plant-centered diets helped lower LDL (“bad”) cholesterol–an important aspect of cardiovascular health. But over time, only the plant-centered eating pattern led to fewer heart attacks and strokes. Most studies like this focus on short-term changes in cholesterol. CARDIA went further, tracking over 4,700 adults for more than 30 years to see how real-world eating habits affect actual cardiovascular outcomes. According to CARDIA researchers, these findings don’t mean that cutting out fat is necessarily wrong. However, prioritizing plant foods could be a more powerful approach overall. Dr. Yuni Choi, a postdoctoral fellow from Jacobs’ lab, emphasizes that it’s critical to look at diet quality from a holistic perspective.“Targeting just single nutrients such as total or saturated fat doesn’t take into account the fats that are also found in healthy plant-based foods such as avocado, extra virgin olive oil, walnuts and dark chocolate–foods that also have cardioprotective properties and complex nutrient profiles,” Choi says.Other studies back up these findings. A 2023 meta-analysis published in the peer-reviewed nutrition journal BMJ Nutrition, Prevention & Health found that even partially plant-based diets (not strictly vegan or vegetarian) significantly lowered the risk of heart attack and stroke. So, the key isn’t going strictly vegan or fat-deprived. It’s consistently including more whole, plant-based foods on your daily menu.

Low-fat isn’t Necessarily the Answer

With this news, many people assume a low-fat, plant-based diet is the best way to protect your cardiovascular health. And while that could be a wise choice, the science here is more nuanced. For decades, public health guidelines have promoted low-fat eating–especially when it comes to saturated fat. This is in large part due to the sugar industry paying Harvard in the 1960s to release a study that shifted the cause of many heart conditions from sugar to bad fats. But in recent years, many experts have started to question whether saturated fat truly deserves its negative reputation.For instance, a 2023 review of 19 major studies found no consistent link between saturated fat consumption and heart disease. And while some older studies suggested it was beneficial to swap saturated for polyunsaturated fat, newer reviews have found major flaws in those early trials. As a result, the evidence for avoiding saturated fat to protect your heart is mixed. A number of studies still indicate that high-fat diets raise markers of heart disease like LDL. But other research suggests that diets high in refined carbohydrates, especially added sugars and ultra-processed grains, may be a bigger driver of heart disease than fat. These refined carbs took fat’s place in many people’s diets when low-fat eating became mainstream–and may have done more harm than good. It’s also important to note that not all saturated fats are created equal. Saturated fats from fast food and processed meats likely affect your body very differently than those from whole-food sources like coconut or grass-fed dairy. While the jury is still out on fat, one fact remains: focusing on balance and overall diet quality is the most reliable path to protecting your heart.

Focus on Whole Foods

You don’t have to cut out all animal products to enjoy the heart-healthy benefits of a plant-based diet. Dr. Choi recommends filling about 70% of your grocery cart with:

Fruits
Vegetables
Legumes (beans, lentils)
Whole grains
Nuts and seeds
Healthy plant oils (olive, avocado)
Fish
Low-fat dairy products

The remaining 30%? That’s up to you. The key is making whole plant foods the foundation of your meals.By prioritizing these foods, you’ll naturally boost your intake of: