What is the substance in egg yolks that leads some people to avoid eating eggs?

The substance in egg yolks that leads some people to avoid eating eggs is cholesterol. Egg yolks are relatively high in dietary cholesterol, which has raised concerns about its potential link to Heart disease. Although recent research suggests that dietary cholesterol may have a minimal impact on blood cholesterol levels for most individuals, some people still choose to limit their intake for health reasons. Additionally, individuals with specific health conditions, such as hypercholesterolemia, may be advised to avoid eggs.