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Posted on 03/01/2026 1:03:45 PM PST by nickcarraway
Research led by Yoshimi Kishimoto (Setsunan University) and Norie Sugihara (Kanagawa University of Human Services)
Yolks Were Blamed For Heart Disease For Decades, But This Major Review Suggests Otherwise
In A Nutshell
-Decades of dietary advice warned against eggs, but a major review of clinical trials and global data finds moderate consumption does not raise heart disease risk for most people.
-Eating eggs raised “bad” LDL cholesterol only modestly, while “good” HDL cholesterol rose at the same time, leaving the clinically important ratio between the two unchanged.
=Antioxidants in egg yolks, lutein and zeaxanthin, appear to protect cholesterol in the blood from the kind of damage linked to artery disease.
-Japan consumes eggs at nearly double the global median rate and has some of the world’s lowest heart disease rates, an association researchers say warrants continued attention.
For generations, cracking a second egg into the pan felt like a small act of dietary defiance. Doctors warned about cholesterol. Health guidelines urged restraint. Millions of Americans swapped yolks for egg whites and wondered if breakfast was quietly killing them. Now, however, a wide-ranging scientific review published in the Journal of Poultry Science is making the case that the alarm bells were set too loud.
The analysis pulls together evidence from clinical trials, large-scale observational studies, and population data spanning 142 countries to examine what eggs actually do to the heart. The answer, drawn largely from observational and ecological research, is more forgiving than most people would expect. For the majority of people, moderate egg consumption does not appear to raise heart disease risk and may, in some cases, offer modest protection.
Nowhere is that finding more relevant than in Japan. Japanese adults eat eggs at nearly double the global median rate, yet Japan consistently ranks among the countries with the lowest rates of ischemic heart disease, the kind caused by reduced blood flow to the heart muscle. Researchers are careful to note that country-level comparisons like this identify associations, not causes, and many factors beyond eggs differ between nations. Still, that contradiction helped motivate the research and forms one of its most compelling threads.
What Eggs Actually Do to Your Cholesterol
Much of the fear around eggs traces back to their cholesterol content. For decades, the thinking was linear: eat more dietary cholesterol, get more in the blood, damage the arteries. In reality, the biology is considerably more complicated.
A meta-analysis of 28 randomized controlled trials found that eating more eggs produced only modest increases in total cholesterol and LDL, the so-called “bad” cholesterol. HDL, the “good” cholesterol that helps clear harmful fats from the bloodstream, rose at the same time. As a result, the ratio between the two, a clinically important marker of heart disease risk, stayed stable. Researchers estimate the total cholesterol rise from eating eggs amounts to roughly 2 to 3 percent per egg, an effect considerably smaller than what saturated fats from red meat and butter produce.
Part of the reason the impact is muted comes down to the body’s own feedback systems. When a person consumes more dietary cholesterol, the liver tends to dial back its own production. Egg white protein also appears to suppress cholesterol absorption in the gut. And in populations whose diets already favor healthy fats over saturated ones, including Japan, the effect is even less pronounced.
The Hidden Ingredient in the Yolk
Eggs carry more than protein and cholesterol. The yolk is rich in lutein and zeaxanthin, two antioxidant compounds that help protect cholesterol in the blood from the kind of damage that makes it more likely to stick to artery walls. Among Japanese women, eggs are the single largest dietary source of zeaxanthin, supplying more than half of total intake.
Sunny side up eggs
It’s estimated the total cholesterol rise from egg consumption amounts to roughly 2 to 3 percent per egg. That’s much less than what saturated fats from red meat and butter produce. (Photo by Ismael Trevino on Unsplash)
Two small studies conducted in Japanese adults put this to a direct test. In both, participants added one egg per day to their usual diet for four weeks. In healthy adults, HDL cholesterol rose and markers of LDL oxidation improved. Among men with moderately elevated cholesterol, total and LDL levels did not rise significantly, while harmful oxidized LDL dropped. Lutein and zeaxanthin levels climbed in tandem, and the higher those antioxidants rose, the lower the damaging LDL tended to fall. Crucially, each study involved fewer than 30 participants over a short period, so these findings are suggestive rather than definitive. The egg yolk, long cast as the villain, may carry its own defense mechanism.
Looking Inside the Arteries Blood tests tell part of the story. A study published in the Journal of Nutritional Science and Vitaminology took a more direct approach, examining 795 Japanese patients who underwent coronary angiography, a procedure that uses imaging to look for blockages inside the arteries feeding the heart. Among those patients, 506 were diagnosed with coronary artery disease and 299 had blockages in more than one artery.
After accounting for age, smoking, diabetes, and other dietary habits, the data showed no significant link between egg consumption and arterial disease. Patients eating fewer than three eggs per week, three to four per week, and at least one per day had comparable rates of blockage.
A more interesting finding surfaced among the 504 patients who were not taking cholesterol-lowering drugs. In that group, people eating three to four eggs per week had roughly half the odds of multi-vessel disease compared to those eating fewer than three eggs per week, suggesting a possible association between moderate intake and lower multi-vessel disease in this subgroup. No such pattern appeared in those eating one or more eggs daily.
The Bigger Picture Population-level data from 142 countries, tracking egg intake and heart disease rates from 1990 to 2018, showed that countries with higher egg consumption tended to have lower rates of ischemic heart disease incidence and death. A large international prospective cohort study involving roughly 177,000 people across 50 countries found no significant connection between egg intake and cardiovascular events or mortality. A 2020 meta-analysis found that eating up to one egg per day was not linked to increased cardiovascular risk and may lower it in Asian populations.
Some studies, particularly those from the United States, have linked high egg consumption with elevated cardiovascular risk. What those studies share is a dietary context where eggs tend to arrive alongside processed meats, refined carbohydrates, and foods high in saturated fat. An egg eaten in that environment is a different proposition than one eaten as part of a diet built around fish, vegetables, and healthy fats. The egg rarely acts alone.
What the evidence does support, across clinical trials, observational studies, and global population data, is that the old blanket warnings may have been too blunt. For most people eating a reasonably balanced diet, eggs appear to be far less dangerous than a generation of dietary advice suggested. Japan eats eggs freely and has some of the world’s lowest heart disease rates. That contrast alone is worth paying attention to.
Disclaimer: This article is based on a scientific review and is intended for informational purposes only. It does not constitute medical advice. Readers with questions about their diet or cardiovascular health should consult a qualified healthcare provider.
Paper Notes
Study Limitations
This is a narrative review rather than an original clinical trial, meaning its conclusions rest on the quality and consistency of the studies it synthesizes. The research it examines varies considerably in design, from small controlled trials to large population analyses. Ecological studies, which compare country-level data, identify correlations and cannot establish cause and effect. The two Japanese intervention studies each involved fewer than 30 participants and ran for only four weeks. The Japanese focus of several key studies means findings may not translate directly to populations with different diets, genetic backgrounds, or cooking practices. The authors acknowledge that population-specific responses and dietary patterns require further investigation through longer-term studies.
Funding and Disclosures
The authors declare no conflict of interest. No external funding sources are listed in the published paper.
Publication Details
Authors: Yoshimi Kishimoto, Department of Food Science and Human Nutrition, Faculty of Agriculture, Setsunan University, Hirakata, Osaka, Japan; Norie Sugihara, Faculty of Health and Social Services, Kanagawa University of Human Services, Yokosuka, Kanagawa, Japan. | Journal: Journal of Poultry Science | Title: “Egg Consumption and Human Health: A Comprehensive Review of the Effects on Serum Lipids, Antioxidant Status, and Cardiovascular Outcomes” | DOI: 10.2141/jpsa.2026001 ” | Published: Journal of Poultry Science, Volume 63, 2026. Available online January 6, 2026. Open Access under Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
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Ping
Eggs are bad, eggs are good, eggs are bad, eggs are good, eggs are bad, eggs are good.
Ain’t Science grand? LOL!
That’s all for now, yolks!
Eggs are bad, eggs are good, eggs are bad, eggs are good, eggs are bad, eggs are good.
Ain’t Science grand? LOL!
Fresh, clean, natural eggs are good for you?
Who knew?
Fresh, clean, natural eggs are good for you?
Who knew?
Fresh, clean, natural eggs are good for you?
Who knew?
I'm 82..still drink whole milk...dunking graham crackers is a favorite night time snack.
I have been told by my doc that the bad LDL cholesterol is created internally and is a factor of genetics. Lipitor is intended to reduce or stop that internal creation of LDL and allow your body to flush what’s there out. Food intake has little, if anything, to do with LDL accumulation. I hope so, we’ll see.
Lot of words to say “duh”.
Every two years science switches its opinion on eggs. One year eggs are verboten, two years later they’re the bees knees. Do you remember when tropical oils were the devil incarnate? Now coconut oil is on every shelf of every grocery store as a super health food!
Be kind, rewind, buckle up for safety, 55 saves lives, and don’t forget to mask up to save your fellow citizens from your disease ridden self!
Every two years science switches its opinion on eggs. One year eggs are verboten, two years later they’re the bees knees. Do you remember when tropical oils were the devil incarnate? Now coconut oil is on every shelf of every grocery store as a super health food!
Be kind, rewind, buckle up for safety, 55 saves lives, and don’t forget to mask up to save your fellow citizens from your disease ridden self!
There is still a pretty heated battle over oils and fats. There are still many that say seed oil and vegetable oils are healthiest, and others who say animal oils/ghee etc. are good or bad. And saturated vs unsaturated fats.
So the 12 yr old me in 1970 was more or less right?
and don’t forget: coffee is bad, coffee is good, coffee is bad, coffee is good ... just more “science”, right?
Breakfast for me alternates between eggs and cereal.
Two pasture-raised eggs on avocado toast one day, cereal the next with whatever kind of milk I have on hand, usually 2% pasture raised, sometimes organic almond milk. Cereal is sometimes oatmeal in winter, delish Panda Puffs with almost no wheat the next.
Bread is an issue. I don’t really like most of it, far too salty. BFree Seed Bread tastes great. Lucky me, I have a Natural Grocer in the ‘hood and can buy it there.
Coconut oil? Not food for me, I have a nice jar in the bathroom. great for chapped skin.
“Data From 142 Countries Shows Eating Eggs May Actually Protect Your Heart, Not Harm It”
CORRECTION: “Data From 142 DOCTORS Shows Eating Eggs May HARMS Your Heart, Not PROTECTS It”
You can “trust your doctor”, but one needs to understand that it is hardly ever the doctor talking, but rather the Medical Group, the Facility, the Medical Board, the Malpractice Insurance Company, and or the Legal Department talking...not your doctor.
These are good for the eyes too.
I was at a hotel all week and had eggs with the hotel breakfast each day followed by three eggs yesterday and three this morning.
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