Sobering news for egg lovers: A major study of nearly 30,000 adults reveals that higher consumption of eggs and dietary cholesterol significantly increases the risk of cardiovascular disease (CVD) and all-cause mortality.
Egg yolks are among the richest sources of dietary cholesterol in common foods, with one large egg providing 186 mg in the yolk alone. The study's lead author notes that other animal products like red meat, processed meats, and high-fat dairy (such as butter or whipped cream) also contribute substantial amounts.
Prior research on eggs has been mixed, with some studies showing no CVD risk increase. However, those often involved smaller, less diverse groups, shorter follow-ups, and limited adjustments for overall diet.
"Our study isolates the effect: If two people eat identical diets except for eggs, we can directly assess egg consumption's impact on heart disease," explains the lead author. "Cholesterol, from any source, was linked to higher CVD risk."
This association held regardless of exercise levels, overall diet quality, or types/amounts of dietary fats. Researchers analyzed data from 29,615 U.S. adults across six prospective cohort studies, with follow-up up to 31 years.
Key findings: Daily intake of 300 mg cholesterol was tied to a 17% higher CVD risk and 18% higher all-cause mortality risk. Cholesterol drove this independently of saturated fats or other fats. Consuming 3-4 eggs weekly linked to 6% higher CVD risk and 8% higher mortality risk.
Should you ditch eggs?
The study advises limiting dietary cholesterol by moderating eggs and red meat.
"Eggs, particularly yolks, contain cholesterol with proven harmful effects—consume in moderation," urges the lead author.
