Low-carb or low-fat? Study reveals what really protects your heart

A 30-year study of 200,000 adults shows heart health depends more on food quality than cutting carbs or fat. Here’s what to eat for a healthy heart. (Image: Pexels)

• Food quality is key for heart health over cutting carbs or fat
• Healthy diets include grains, fruits, nuts, and healthy fats
• Processed foods and low-quality ingredients increase heart disease risk

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The dilemma of choosing between low-carb and low-fat diets confuses many people trying to eat healthy. With endless advice online, some cut bread and rice while others avoid fats, leaving them unsure which approach truly supports heart health and their well-being.

A recent research, published in the Journal of the American College of Cardiology, followed nearly 200,000 adults in the United States for more than 30 years. During that time, over 20,000 people developed coronary heart disease. By analysing this huge amount of data, researchers reached a clear conclusion that it’s not about cutting carbs or fat, it’s about choosing better-quality foods.

The scientists compared healthy and unhealthy versions of both low-carb and low-fat diets. What made the difference wasn’t the amount of carbs or fat, but where those nutrients came from.

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Healthy low-carb or low-fat diets included

• Whole grains
• Fruits and vegetables
• Nuts and seeds
• Beans and legumes
• Healthy fats like olive oil and avocado

Unhealthy versions included

• White bread and refined grains
• Sugary snacks and drinks
• Highly processed foods
• Large amounts of red and processed meat
• Saturated animal fats

People who followed the healthier versions, whether low-carb or low-fat, had a lower risk of heart disease. They also had better cholesterol levels, lower triglycerides (a type of fat in the blood), and less inflammation in the body.

On the other hand, those who followed low-carb or low-fat diets filled with processed foods and poor-quality ingredients actually had a higher risk of heart problems. Simply removing carbs or fat did not automatically make a diet healthy.

Moreover, the study found that healthy low-carb and healthy low-fat diets seemed to protect the heart in similar ways, which means you don’t have to follow a strict or extreme diet to stay healthy. You can choose a style of eating that suits you, as long as the food quality is good.

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The researchers also noted that the study did not focus on extreme diets like very strict ketogenic plans. Most people in the study ate moderate amounts of carbs and fats. Also, participants reported their own eating habits, which is not always perfectly accurate. Still, the study’s size and long follow-up make its message strong and practical. After decades of confusion and diet wars, it Is now clear that it’s not important to obsess over cutting carbs or fat. Instead, focus on eating real, minimally processed foods.

FAQs on How Food Quality, Not Carb Cutting, Impacts Heart Health

Does cutting carbs improve heart health?

Not necessarily. It’s the quality of the food you eat that matters more for heart health than merely cutting carbs.

What are examples of healthy foods for heart health?

Whole grains, fruits and vegetables, nuts and seeds, beans and legumes, and healthy fats like olive oil and avocado.

Can a low-fat diet be unhealthy?

Yes, if it includes processed foods, sugary snacks, and unhealthy fats. The key is to choose minimally processed, nutritious foods.

Do I need to follow a strict diet for heart health?

No, you don’t need to follow a strict diet. Eating a variety of real, minimally processed foods is what’s important for heart health.

Disclaimer: This article, including health and fitness advice, only provides generic information. Don’t treat it as a substitute for qualified medical opinion. Always consult a specialist for specific health diagnosis