Replacing animal-derived proteins and saturated fats with plant-based proteins and unsaturated fats reduces the risk of coronary heart disease by improving lipid profiles, reducing inflammation, and enhancing endothelial function.

Study: Replacing Animal-Based Proteins with Plant-Based Proteins Changes the Composition of a Whole Nordic Diet—A Randomised Clinical Trial in Healthy Finnish Adults

This study showed that when people ate more plant-based proteins and less animal-based ones, their 'bad' cholesterol went down and their diet got healthier—exactly what the claim says helps prevent heart disease.

Study: The impact of PBD (plant-based diet) on atherosclerosis biomarkers in the risk and progression of coronary heart disease: A systematic review of randomized controlled trials

This study found that eating more plants and fewer animal products lowers bad cholesterol, reduces body inflammation, and improves blood vessel health—all things that help prevent heart disease, just like the claim says.

Study: Dietary and Policy Priorities for Cardiovascular Disease, Diabetes, and Obesity: A Comprehensive Review

The study says eating more plants like beans, nuts, and olive oil instead of red meat and butter helps your heart, which matches the claim that swapping animal fats for plant fats lowers heart disease risk.

Study: Animal-based and plant-based protein-rich foods and cardiovascular health: a complex conundrum.

When people ate more meat (even lean meat), their 'bad' cholesterol went up; when they ate more beans, nuts, and tofu instead, their bad cholesterol went down—exactly what the claim says happens when you swap animal proteins for plant ones.