Egg Advice Is All Over the Place. What Should You Do?
Eggs are nutritious - but what they mean for cholesterol, heart health and longevity is more complicated than either side admits.
Honestly, I dread writing about eggs.
The comments always flood in, and there are usually some raised voices in the mix. Eggs have become a battlefield. Some people have a deep emotional attachment to their morning egg ritual, while others look at the yolk and see a bright yellow cholesterol grenade sitting in the middle of breakfast.
My working life isn’t exactly leisurely, and eggs are one of those foods that can rescue a day without any elaborate meal planning, so part of me hoped the evidence would let me recommend them without hesitation.
However, by the time I finished, I was less comfortable with that reassurance.
The great egg debate is often strident and overly confident. Online, eggs are presented as either dangerous or essential for long-term health. The evidence is far more complicated and highly context-dependent: the implications vary according to who you are, where you live, your age, your cardiovascular and metabolic health, and how your body responds to dietary cholesterol.
Let’s walk through the evidence that led me to my conclusions.
This issue gives you the practical five-minute answer. My full, paywalled Medium articles are usually reserved for paid One Health Tweak a Week subscribers, but I know some of you will want to see the detailed evidence, so I’ve made the complete 21-minute read available to everyone. You’ll find it here.
What eggs genuinely offer
Nutritionally, eggs are very useful. They deliver high-quality protein, all the essential amino acids, and meaningful amounts of choline, B12, iodine, selenium, lutein and zeaxanthin.
They’re one of the best dietary sources of choline, a nutrient many people don’t get enough of. Two eggs can provide 10–30% of several daily vitamin requirements. They’re convenient, accessible and genuinely nutritious.
To understand eggs, it’s important to recognise that the white and the yolk are fundamentally different foods.
Egg white is roughly 88% water, with the rest mostly protein. It contains virtually no cholesterol and almost no fat.
Egg yolk is where the richest micronutrients live: fat-soluble vitamins, choline, lutein, zeaxanthin. But it’s also where almost all the cholesterol sits. A single large yolk contains roughly 185 milligrams of cholesterol.
So, eggs are nutrient-dense, but that doesn’t necessarily mean eating eggs every day for decades is a good idea if you have an eye on your long-term health.
Dietary cholesterol never became irrelevant
About ten years ago, the American Heart Association and the US Dietary Guidelines removed the strict 300 mg/day cholesterol limit. Many people interpreted this as “dietary cholesterol doesn’t matter.” Remarkably, the word “cholesterol” doesn’t appear once in the recently released Dietary Guidelines for Americans 2025–2030.
But the AHA didn’t drop that numerical target because they thought cholesterol was unimportant. Rather, they thought the target didn’t help people make healthy dietary decisions.
Dietary cholesterol raises LDL cholesterol. Researchers estimate that each 100 mg of dietary cholesterol raises blood LDL by 1.9–4.6 mg/dL. The effect is non-linear: the biggest jump occurs with roughly the first 200 mg of added daily cholesterol. Since a large egg contains about 185 mg, that first daily egg lands right in the steepest part of the curve.
What about HDL, the so-called good cholesterol? Eggs can raise HDL as well as LDL, and defenders often point out that the ratio between them may remain similar. That’s important because for a while we thought that the HDL:LDL ratio was more important than your LDL number.
Unfortunately, drugs that substantially raised HDL failed to reduce cardiovascular event. If raising HDL doesn’t lower risk, a preserved ratio isn’t the reassurance we once thought, and that raised LDL comes back into focus.
The more telling marker is ApoB, which counts the atherogenic particles most likely to drive plaque formation in your arteries. A meta-analysis of 66 randomised controlled trials found that egg consumption raises ApoB in a linear, dose-dependent fashion. That means the more eggs you eat, the higher your ApoB.
While LDL cholesterol tells us how much cholesterol is being carried in certain particles, ApoB is closer to a particle count: each atherogenic particle carries one ApoB molecule. Those particles can enter the artery wall and help form plaque, which is why ApoB is now considered a particularly useful marker of cardiovascular risk.
Even the American Heart Association’s 2020 science advisory isn’t as pro-egg as many would have us believe.
It does say that up to one egg daily may be okay for most healthy adults. But it also acknowledges that dietary cholesterol raises LDL, recommends dietary patterns inherently low in cholesterol, and specifically identifies yolks as cholesterol-rich. Given that eggs are the most cholesterol-rich food in the Western diet, there’s an inherent conflict there.
So eggs may be nutritionally dense, but they also provide a concentrated dose of cholesterol with measurable effects on the particles that drive atherosclerosis and cardiovascular disease.
What happens over the long term?
If all this talk of blood markers feels abstract, what happens when researchers follow people for years and count heart attacks, strokes and deaths?
In a landmark study pooling almost 30,000 American adults across six prospective studies, with an average follow-up of 17.5 years, each additional half egg per day was linked to a 6% higher risk of cardiovascular disease and an 8% higher risk of death from any cause.
A key finding was that when the researchers adjusted for dietary cholesterol, the signal disappeared. That suggests cholesterol likely explains much of the egg’s links to cardiovascular disease, and fits with the American Heart Association’s advice to stick to a diet low in cholesterol.
A study of more than 520,000 Americans aged 50–71 found that each half egg per day was associated with a 7% higher risk of premature death from any cause, 7% higher cardiovascular death, and 7% higher risk of dying from cancer. The researchers estimated that the cholesterol in the eggs accounted for roughly two-thirds of the effect.
And a meta-analysis involving nearly 12 million participants found that each daily egg was linked to a 6% higher risk of premature death from any cause, with stronger signals in Americans, people over 60, and studies with at least 15 years of follow-up.
The authors concluded: “Overall, the findings support public health recommendations to moderate egg intake.”
So we’re seeing that in studies with large populations and long follow-up, there’s a dose-response pattern of associations between cardiovascular disease and death and eggs. This finding is replicated across Western populations and is consistent with the LDL and ApoB evidence. It’s hard to ignore that.
We’re never going to have a 30-year trial assigning thousands of people to daily egg yolks, so longevity decisions must sometimes be made before evidence reaches that impossible standard.
Why some studies look reassuring
Not every large study finds harm.
A US-based study of more than 215,000 health professionals found no greater cardiovascular risk with up to one egg daily. Chinese studies of more than 461,000 adults have even linked daily eggs to better outcomes.
So, why don’t these reassure me?.
The US health-professional study participants skew healthier than average, and very few ate one egg or more every day. They don’t necessarily represent the population as a whole.
In Chinese studies, higher egg consumption tends to mark higher income, better education, urban living and a more varied diet: the opposite of Western patterns, where people who eat more eggs tend to have higher BMI, eat more processed meat, exercise less and smoke more. The highest-intake group in the large Chinese study averaged just 0.76 eggs per day, and people with diabetes were excluded - they’re some of the people with the highest risk of egg-related cardiovascular disease.
When you combine Western studies (where eggs consistently trend towards harm) with Asian studies (where they trend towards benefit), the average can come out looking neutral. That may be mathematically correct, but it’s not helpful for someone in Colorado or Xian wondering what to have for breakfast.
Meal context matters too. A boiled egg isn’t the same as a fried egg with bacon. But even among people following a healthy diet, the link between higher egg intake and worse outcomes persisted. A healthy overall diet didn’t appear to fully cancel the risk.
So, context and individual biology matter, and quoting global average effects is unhelpful. This newsletter would come to very different conclusions if it were written for readers in, say, Thailand, vs the US and Western Europe.
Uncle Bob and the problem with averages
It’s pretty common in the comments for somebody to tell me about an uncle who ate three eggs every morning and lived into his eighties.
Uncle Bob’s experience may be entirely genuine. But it tells you how Uncle Bob responded, not how you will.
We don’t all handle dietary cholesterol in the same way. In a study of older adults, researchers gave participants three large eggs a day for a month and measured what happened to their blood cholesterol.
Some people saw large increases in total cholesterol. Others barely changed, or even decreased. Mathematically, if you average the group, it looks like nothing happened.
But roughly 15–20% of people are hyper-responders, hidden inside that reassuring average. The practical problem is that most of us have never measured LDL or ApoB before and after changing our egg intake, so we have no idea how we respond to the cholesterol in the eggs we eat.
Uncle Bob may simply have been at the reassuring end of this graph.
Who should be especially cautious?
The case for restraint is stronger if you have type 2 diabetes, established cardiovascular disease, raised LDL or ApoB, metabolic syndrome or hypertension.
People with type 2 diabetes. In one large US study, each daily egg increased cardiovascular disease risk by 25% in people with diabetes. Higher egg consumption is also linked to a higher risk of developing type 2 diabetes in US populations: 18% higher per daily egg. If you have type 2 diabetes and eggs feature prominently in your diet, please talk to your doctor or dietitian.
People with cardiovascular disease, high LDL, high ApoB, metabolic syndrome or hypertension. You have less margin for avoidable risk. Egg whites, yogurt, legumes, fish and nuts can fill the protein gap without bringing the same yolk cholesterol load.
Older adults. Older adults face a genuine trade-off. They need enough protein to protect muscle, strength and independence, and eggs are convenient. But convenience doesn’t make yolks the best daily protein source, particularly as cardiovascular risk rises with age.
Eating one to six eggs per week was associated with lower mortality in one study of over-70s, while a meta-analysis, found a 10% higher risk of dying from any cause in those who ate the most. Taken together, these findings don’t suggest that older adults need to avoid eggs, but they also don’t support relying on yolks as a principal protein source.
It’s worth remembering that you can take advantage of all the egg’s protein without the cholesterol by only eating the whites.
Where I land
Having reviewed the evidence, I don’t believe that daily egg yolks are a good idea for most people concerned about long-term health and longevity.
That isn’t the same as saying you should never eat them. An occasional whole egg is unlikely to be a major concern for most otherwise healthy people, and some can eat several every day and remain apparently healthy (hello, Uncle Bob!). And let’s not forget, eggs provide useful nutrients.
But you can’t ignore the fact that whole eggs raise LDL and ApoB levels, both linked to cardiovascular disease. Nor can you ignore the associations between eggs and cardiovascular disease and premature death seen repeatedly in Western studies. Add the higher risks in vulnerable groups, and the fact that vanishingly few of us know how our biochemistry responds to dietary cholesterol, and I’m just not comfortable recommending yolks as an everyday food.
Egg whites are materially different because they don’t carry the same cholesterol load. I have no such concerns about egg whites.
For myself, I keep yolks to around 2 per week, often fewer. That’s my own cautious decision after weighing uncertain benefits against an avoidable risk signal. I prefer to get my protein from foods that don’t bring along all that cholesterol.
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HEALTH TWEAK OF THE WEEK
Whole eggs are nutritious, but their yolks provide a concentrated dose of cholesterol that raises LDL and ApoB in controlled trials, while several large Western studies associate higher egg consumption with higher risks of cardiovascular disease and premature death.
The occasional egg is fine, but it seems wise not to treat yolks as an everyday protein source.
If long-term health and longevity are your priorities, enjoy whole eggs occasionally, use egg whites freely, and choose other protein-rich meals most of the time.
What that looks like depends on where you’re starting:
1. Make whole eggs an occasional food
If you currently eat eggs every day, don’t simply reduce 2 or 3 yolks to 1 and assume the problem is solved. Begin replacing most of those meals. Use egg whites when you still want the convenience of eggs, and rotate in other protein-rich options like yogurt with nuts, oats with seeds, tofu with vegetables, or beans with whole grains.
2. Change the rest of the breakfast, too
For most meals, the better option is neither daily yolks nor bacon, sausages and other processed meats. If your eggs usually come with butter, fried bread or processed meat, move the whole meal towards foods that support long-term health rather than removing one concern and leaving the others untouched.
3. Be more cautious if your cardiovascular risk is already raised
If you have type 2 diabetes, cardiovascular disease, high LDL or ApoB, metabolic syndrome or hypertension, regular yolks are even harder to justify. The harmful associations are stronger in these groups, so it’s sensible to favour egg whites and other protein sources and discuss any substantial dietary change with your doctor or dietitian.
4. Keep occasional eggs in proportion
If you’re otherwise healthy and enjoy Eggs Benedict on a Sunday morning, relax. An occasional whole egg is unlikely to be a major influence on how long or how healthily you live.
The concern is the habit, not the isolated breakfast: enjoy whole eggs occasionally, but let egg whites and other protein-rich foods carry most of the weekly load.
🎧 Prefer to listen while making breakfast and wondering whether the eggs are helping or harming you?
🎙️ This week’s One Health Tweak a Week podcast is about eggs, dietary cholesterol, and whether whole eggs deserve a regular place in a longevity-focused diet.
You’ll hear:
Why egg whites and egg yolks need to be treated as nutritionally different foods
What controlled trials show about dietary cholesterol, LDL cholesterol and ApoB
Why long-term studies from Western and Asian populations often appear to reach different conclusions
Why some people can eat several eggs a day with little apparent effect, while others may experience substantial rises in cholesterol
How to decide whether eggs should be an occasional pleasure, a regular habit, or something you approach more cautiously
👉 Ideal for your next walk, commute, or while standing in the kitchen wondering how the same omelette became dangerous, healthy and dangerous again within the space of a few decades.
(Episodes are free for now. Paid subscribers support the deeper research, and the practical tools I’m building to help you act on what you learn, rather than simply collect another interesting health fact.)
🧭 Before you go
💬 How often do whole eggs turn up in your week?
And has the changing advice about cholesterol altered how you think about them?
📤 Know someone who eats eggs every day for protein, or someone who has completely lost track of whether eggs are supposed to be healthy this decade? Send this their way.
👥 Paid corner – Unsure how the evidence applies to your own diet, cholesterol results or protein needs? Drop me a note in our private chat, and we can think through where eggs fit alongside your other regular meals and risk factors.
Until next Saturday, may your breakfasts be satisfying and your nutritional advice stay consistent for at least long enough to finish the washing-up.
– Ben
I'm in the camp of the dietary skeptic. As you noted, the advice re eggs (and butter and cheese and fish and whole milk and whatever else) has swung wildly over the past few decades. As a vegetarian, I rely on whole eggs for B12 and protein, and have 5-6 per week. Not eating meat means my total intake of dietary cholesterol is low, anyway.
Such helpful info Dr Ben!