Butter vs Margarine vs Ghee: What Heart Research Says Now

A reader emailed last week with a photo of her fridge door: a block of grass-fed butter, a tub of olive-oil spread, and a jar of ghee she bought after watching a video that called it “the only fat your heart loves.” Which one, she asked, is she supposed to be using? The butter vs margarine question has been simmering for fifty years, and as of mid-2025 it is boiling over again.

Two things lit the stove. In March 2025, a large analysis in JAMA Internal Medicine followed more than 200,000 US adults for over three decades and reported that people who ate the most butter had higher death rates than those who ate the least, while people who used the most plant oils had lower ones. Around the same time, social feeds filled with confident claims that seed oils are poison and that ghee is a superfood.

Neither headline tells the whole story. Here is what the research actually supports, how strong it is, and what belongs on your toast.

Why butter vs margarine is trending again

Nutrition arguments tend to come in cycles, and fat is the longest-running one. In the 1980s margarine was the heart-healthy choice. By the 2000s the trans fat scandal flipped that, and “butter is back” became a magazine cover. Now the pendulum is swinging a third time, and the swing is driven by better data rather than fashion.

The newest push comes from long-running cohort studies, which are large groups of people followed for decades while researchers track what they eat and what happens to their health. The 2025 JAMA Internal Medicine analysis pooled three such cohorts, roughly 221,000 nurses and health professionals followed for up to 33 years. The highest butter eaters had about a 15 percent higher risk of dying during follow-up than the lowest; the highest plant-oil users had about a 16 percent lower risk. Swapping a modest daily amount of butter for plant oils was associated with roughly 17 percent lower mortality.

Those are associations, not proof of cause, and we will grade them honestly later. But they landed at the same moment that short-form video began promoting beef tallow, ghee and butter as “ancestral” fats while branding canola and soybean oil as toxic. The two narratives collided, and search interest in every version of the butter vs margarine question jumped.

What matters for your kitchen is simpler than the noise suggests. The science on fat has not reversed; it has refined. The type of fat you spread and cook with has a measurable, if modest, effect on your blood cholesterol, and blood cholesterol has a well-established effect on your arteries. Everything else is detail, and the details are worth knowing.

What changed recently

Several dated milestones explain why the advice you read today differs from the advice your parents got.

Trans fat was effectively removed from the US food supply. The Food and Drug Administration decided in 2015 that partially hydrogenated oils, the industrial source of trans fat, were no longer “generally recognized as safe,” and after compliance deadlines the last products were phased out by early 2021. The American Heart Association now describes industrial trans fat as largely eliminated from US packaged foods, which means the margarine that earned a bad name in the 1990s is not the margarine sold today.

The World Health Organization tightened its position. In July 2023 WHO published updated guidelines recommending that saturated fat supply no more than 10 percent of daily energy and trans fat no more than 1 percent, and that saturated fat be replaced with polyunsaturated and monounsaturated fats from plant sources rather than with refined starches. In January 2024 WHO certified the first five countries, including Denmark and Thailand, as having eliminated industrially produced trans fat from their food supplies.

Large observational datasets matured. The 2025 JAMA Internal Medicine analysis is the most publicized, but it builds on the same cohorts that earlier linked higher plant-oil intake to lower heart-disease risk. Thirty years of follow-up allows the kind of substitution analysis that was not possible when the “butter is back” wave hit in 2014.

Finally, the marketplace changed. Spreads now carry olive, avocado or canola oil on the front label, plant-sterol spreads sit beside them, and ghee has moved from specialty shelves into mainstream supermarkets. The products changed faster than the folk wisdom about them.

What's actually in butter, margarine and ghee?

Start with what these foods are, because the names hide a lot.

Butter is churned cream: roughly 80 percent fat, the rest water and milk solids. About two thirds of that fat is saturated. A single tablespoon delivers around 7 grams of saturated fat and about 30 milligrams of dietary cholesterol. Grass-fed butter contains slightly more omega-3 fat and vitamin K2, but the saturated-fat figure barely moves.

Ghee is butter that has been simmered until the water evaporates and the milk solids brown and sink, then strained. What remains is nearly pure butterfat, about 99 percent, with only traces of lactose (milk sugar) and casein (milk protein). Because the water is gone, a tablespoon of ghee carries a bit more fat than a tablespoon of butter, roughly 8 to 9 grams saturated.

Margarine is an emulsion of plant oils and water made to mimic butter’s texture. Stick margarine is firm because manufacturers blend in fully hydrogenated or interesterified oils, or tropical fats such as palm, to raise the melting point. Hydrogenation is a process that adds hydrogen to liquid oil to make it solid; interesterification rearranges fatty acids on the fat molecule to achieve firmness without creating trans fat. Tub margarines are softer because they contain more liquid oil and water, and a tablespoon of a typical soft spread has about 1 to 2 grams of saturated fat and no industrial trans fat.

So the three products differ most in two things: the share of saturated versus unsaturated fat, and whether they came from a cow or a plant. Those two differences drive nearly every claim you will hear about them.

Saturated fat: the number that drives most of the debate

Saturated fat is fat whose carbon chain is fully loaded with hydrogen, which is why it stays solid at room temperature. Its effect on blood cholesterol is one of the best-replicated findings in nutrition science. Controlled feeding studies going back to the 1960s show that when saturated fat replaces unsaturated fat in the diet, LDL cholesterol rises. LDL, often called “bad” cholesterol, is the particle most directly tied to plaque in artery walls.

The size of the effect is moderate and predictable. Replacing about 5 percent of daily calories from saturated fat with polyunsaturated fat lowers LDL by roughly 10 percent in trials. A Cochrane review updated in 2020, pooling randomized trials with more than 56,000 participants, found that cutting saturated fat reduced combined cardiovascular events by about 17 percent over two years or more, with the clearest benefit when the replacement was polyunsaturated fat rather than carbohydrate.

Guidelines reflect this consistency. WHO advises under 10 percent of energy from saturated fat. The American Heart Association suggests under 6 percent for people who need to lower LDL, which is about 13 grams on a 2,000-calorie day. The NHS puts the ceiling at 30 grams a day for men and 20 grams for women.

Hold those numbers against the tablespoon figures above. Two tablespoons of butter or ghee on morning toast can account for half or more of the NHS target before lunch. Two tablespoons of soft margarine would use up a fraction of it. That arithmetic, not any mysterious property of margarine, is why most cardiology bodies still rank spreads made from liquid oils ahead of dairy fats.

Did margarine's trans fat problem really go away?

Yes, in the United States and in a growing list of countries, but the history deserves a fair telling because it explains the lingering distrust.

Early margarines were made by partially hydrogenating vegetable oils, which created trans fat as a byproduct. Trans fat is an unsaturated fat with a bent molecule straightened out, which lets it behave like a saturated fat in the pan and, unfortunately, in the bloodstream. Trans fat raises LDL, lowers protective HDL cholesterol, and promotes inflammation. Observational studies in the 1990s linked each 2 percent of calories from trans fat to roughly a 23 percent higher risk of coronary heart disease. For a time, stick margarine was a worse choice than butter.

Regulators responded. Denmark limited industrial trans fat in 2004. The US required trans fat on nutrition labels from 2006, then revoked the safe status of partially hydrogenated oils in 2015 with final compliance in 2021. WHO launched a global elimination initiative in 2018 and now reports that more than 50 countries have best-practice policies.

Modern margarines achieve firmness through interesterification, blending with fully hydrogenated oil (which contains no trans fat), or adding palm or coconut fat. Their trans content is at or near zero. One honest caveat: a US label may read “0 g trans fat” if a serving contains less than 0.5 grams, so check that the ingredient list contains no “partially hydrogenated” oil. In practice, that phrase has nearly vanished from spreads.

Interesterified fats themselves have been studied less. Short trials suggest they are neutral to slightly unfavorable for blood lipids compared with unmodified liquid oils, but clearly better than trans fat. That is a reason to prefer the softest spreads, which contain the least of them.

Butter vs margarine: which is better for cholesterol?

If the question is narrowed to blood cholesterol alone, the answer has been consistent for decades: a soft margarine made mostly from liquid plant oil is better for LDL than butter, and the difference shows up within weeks.

Randomized crossover trials, in which the same people eat each fat for several weeks in turn, are the strongest design here. In these studies, switching from butter to a polyunsaturated-rich spread typically lowers LDL by 5 to 10 percent, with little change in HDL. The effect scales with how much spread a person uses and how saturated the rest of the diet is. Someone who uses a thin scrape of butter twice a week will see almost no difference; someone who cooks with it daily will.

Plant-sterol spreads deserve a separate note. Plant sterols are compounds that block some cholesterol absorption in the gut. At the amounts used in trials, they lower LDL by roughly 7 to 10 percent on top of any benefit from the fat profile. That is a real, randomized-trial effect, though no trial has yet shown that these spreads reduce heart attacks, and anyone on cholesterol-lowering medication should mention them to their prescriber rather than treat them as a substitute.

Does a lower LDL from a spread translate into fewer heart events? Trials of whole-diet fat substitution say yes, modestly. No one has run a decades-long randomized trial of butter against margarine alone, which is why the 2025 cohort findings matter: they fill in the long-term outcome picture, albeit with observational data.

Where butter wins is flavor and simplicity of ingredients, and those are legitimate reasons to keep some in the fridge. The evidence simply argues for treating it as a seasoning rather than a staple.

Ghee benefits: what's real and what's folklore

Ghee has three genuine advantages, and several claims that outrun the data.

The first real benefit is heat tolerance. With the water and milk solids removed, ghee has a smoke point near 250°C (about 480°F), compared with roughly 150°C (300°F) for butter. Smoke point is the temperature at which a fat begins to break down and smoke, producing acrid compounds. For high-heat searing or frying, ghee behaves far better than butter.

The second is tolerability for people with lactose intolerance, the inability to digest milk sugar. Properly made ghee contains only trace lactose. It is not, however, safe for a true milk-protein allergy, because trace casein can remain.

The third is culinary: a nutty flavor and long shelf life without refrigeration.

Now the claims. Ghee is often promoted for its butyrate, a short-chain fatty acid that nourishes the cells lining the colon. Ghee does contain butyrate, around 3 to 4 percent of its fat, but the butyrate your colon actually uses comes overwhelmingly from gut bacteria fermenting dietary fiber, not from fat you swallow and absorb in the small intestine. Conjugated linoleic acid, another ghee talking point, has shown effects in rodents and in a few small human trials with inconsistent results.

On the heart, ghee’s saturated-fat content is slightly higher than butter’s per spoon, and no randomized trial shows it protects arteries. A handful of small observational studies from India point in both directions, which is the signature of weak evidence. Heating or long storage of ghee can also generate oxidized cholesterol products, a concern raised in laboratory and animal work but not settled in humans.

Verdict: an excellent cooking fat for the right dish, not a health food.

What the evidence actually says, graded

Nutrition claims deserve the same grading a clinician gives a drug claim. Here is the butter, margarine and ghee literature sorted by strength.

Strong (randomized trials, consistent): Replacing saturated fat with unsaturated fat lowers LDL cholesterol. Industrial trans fat raises LDL and lowers HDL. Plant sterols lower LDL. These findings have been replicated across dozens of controlled feeding studies and are the basis of every major guideline.

Moderate (randomized trials with limitations, plus large cohorts): Reducing saturated fat lowers cardiovascular events by roughly 17 percent, per the 2020 Cochrane review. The trials are older, varied in design, and showed no clear effect on total mortality, which is why the estimate is moderate rather than strong.

Moderate-to-limited (observational only): Higher butter intake is associated with higher mortality, and higher plant-oil intake with lower mortality, in the 2025 JAMA Internal Medicine cohorts. The cohorts are large and well measured, but people who use plant oils also tend to exercise more, smoke less and eat more vegetables, and statistical adjustment can never fully remove that. Earlier meta-analyses of butter specifically, such as a 2016 pooled analysis, found only a weak link to heart disease and a slight inverse link to diabetes, so the picture is not uniform.

Limited (small or short studies): Interesterified fats are roughly neutral for lipids. Ghee’s butyrate or conjugated linoleic acid content has any clinical effect. Grass-fed butter is meaningfully better for the heart than conventional.

Expert opinion or unsupported: Seed oils drive inflammation at normal intakes. Ghee “detoxifies” or protects the heart. Margarine is chemically akin to plastic.

Read in that order, the practical ranking almost writes itself: liquid plant oils and soft spreads first, butter and ghee as flavoring, trans fat nowhere.

Butter, margarine and ghee side by side

Numbers vary by brand, so treat these as typical values per tablespoon (about 14 grams) and check your own label.

Fat	Saturated fat	Industrial trans fat	Smoke point	Main unsaturated fats	Evidence summary
Butter	About 7 g	None (trace natural ruminant trans)	About 150°C / 300°F	Some monounsaturated	Raises LDL vs plant oils (strong); linked to higher mortality in cohorts (observational)
Ghee	About 8 to 9 g	None (trace natural)	About 250°C / 480°F	Some monounsaturated	Same saturated-fat profile as butter; heart claims unproven (limited)
Stick margarine	About 2 to 3 g	0 g in current US products	Varies, about 150 to 180°C	Mixed; may include palm fat	Lower LDL than butter (strong); interesterified fat data limited
Soft tub margarine	About 1 to 2 g	0 g	Not suited to high heat	Polyunsaturated and monounsaturated	Best lipid profile of the spreads (strong for LDL)
Plant-sterol spread	About 1 to 2 g	0 g	Not suited to high heat	Polyunsaturated and monounsaturated	Extra LDL lowering (strong); no outcome trials
Olive or canola oil, for comparison	About 1 to 2 g	0 g	About 190 to 230°C	Mostly monounsaturated (olive) or mixed (canola)	Lower LDL and fewer events in substitution analyses (moderate)

Two patterns stand out. First, the saturated-fat gap between dairy fats and plant-based spreads is roughly four- to sevenfold per spoon, which is large enough to matter at daily use. Second, smoke point and heart profile pull in different directions for ghee: the best fat for the pan is not the best fat for the artery. Choosing a fat for the job, high-heat versus spreading versus dressing, resolves most of the conflict.

Which is better for cooking, butter or oil?

For most everyday cooking, liquid oil is the better default, and the reasons are both nutritional and practical.

Nutritionally, olive, canola, sunflower, soybean and avocado oils are predominantly unsaturated. Every tablespoon used in place of butter shifts the day’s fat balance toward the profile that lowers LDL in trials. The 2025 cohort analysis found the strongest mortality associations for olive, soybean and canola oils specifically, which happen to be the oils most people already cook with.

Practically, oils tolerate heat. Extra-virgin olive oil smokes around 190 to 210°C (375 to 410°F), refined olive and canola oils higher still. Butter’s milk solids scorch well below that, which is why a butter-only pan browns and then burns. Ghee solves the burning problem but keeps the saturated fat, so it earns a place for high-heat Indian and Middle Eastern dishes where its flavor is the point, not as the daily sauté fat.

There is a persistent claim that heating seed oils generates harmful compounds. Any fat heated past its smoke point degrades, and repeatedly reused deep-fryer oil accumulates oxidation products that are worth avoiding. Normal home cooking, with fresh oil and moderate heat, does not produce these at meaningful levels, and no human trial links ordinary use of refined seed oils to inflammation or heart disease. The dietary omega-6 fat they contain, linoleic acid, is associated with lower, not higher, cardiovascular risk in pooled cohort data.

Where butter still belongs: finishing a sauce, baking where its water content and flavor shape the result, and the occasional piece of toast. Use oil for the base, butter for the accent, and the arithmetic works out.

Can I replace butter with margarine in recipes and daily eating?

Usually yes, with a few kitchen caveats and one nutritional one.

For spreading, any soft margarine or oil-based spread substitutes directly. The texture is softer straight from the fridge, which many people prefer.

For baking, the answer depends on fat content. Stick margarine with about 80 percent fat behaves much like butter in cookies, pastry and cakes. Soft tub spreads often contain 60 percent fat or less, with the rest water; the extra water makes cookies spread thin and pastry tough, and “light” spreads at 40 percent fat will not cream properly at all. If a recipe depends on butter’s structure, use a stick product or a recipe written for oil instead.

For frying, soft margarine is a poor choice. Its water content spits, and its lower smoke point burns. Reach for oil, or for ghee if the dish calls for dairy flavor at high heat.

The nutritional caveat is that “replace” should not become “double.” The benefit of switching comes from exchanging saturated fat for unsaturated fat at the same quantity. A person who swaps butter for margarine and then uses twice as much, reasoning that it is the healthier option, gains calories without gaining much lipid benefit. Both products are roughly 100 calories a tablespoon.

One more practical point: reading the ingredient list matters more than the front label. A spread that advertises olive oil may list palm or coconut fat first. The first two ingredients tell you which fat you are really buying, and a product whose saturated fat is under 2 grams per serving and whose list contains no partially hydrogenated oil is a reasonable choice regardless of what the packaging promises.

Is margarine a natural food, and does natural matter?

Margarine is a manufactured food, and the honest answer is that butter and ghee are processed too, just with older techniques.

Butter requires separating cream, pasteurizing it, churning it to break the fat globules, washing and salting. Ghee adds a cooking and straining step. Margarine starts with pressed or solvent-extracted oil, refines it to remove impurities, blends it with water, salt and emulsifiers (compounds that keep oil and water from separating), and adjusts its firmness by interesterification or by adding solid plant fats. Vitamins A and D are often added, as they are to many dairy products. Colorants such as beta-carotene or annatto, both plant pigments, give the yellow hue.

None of that is secret, and none of it has been shown to harm health. The one ingredient category that did, partially hydrogenated oil, has been removed. What remains is a product with more processing steps than butter but a better fat profile.

The deeper question is whether “natural” predicts “healthy,” and the evidence says it does not reliably. Saturated fat is entirely natural and raises LDL. Trans fat occurs naturally in small amounts in beef and dairy. Plant sterols are natural, and they are added to spreads precisely because they lower cholesterol. Processing is a poor proxy for the thing that actually matters, which is what the food does in the body.

A reasonable middle position: prefer spreads with short ingredient lists dominated by a named liquid oil, and prefer a drizzle of olive oil, which is minimally processed and strongly supported by evidence, over either butter or margarine when a recipe allows. That satisfies both the instinct for simplicity and the data.

Common myths about butter vs margarine

Some claims are repeated so often they feel like facts. Checked against the evidence, they do not hold up.

“Margarine is one molecule away from plastic.” This is chemistry folklore. Margarine is made of fatty acids, water, salt and emulsifiers. Plastics are long synthetic polymers. Changing “one molecule” of almost any substance produces a different substance; water is one atom away from hydrogen peroxide. The claim conveys nothing about safety.

“Margarine is worse than butter because of trans fat.” True for the stick margarine of 1995, false for products sold in the US today. Industrial trans fat has been removed, and the current comparison is saturated versus unsaturated fat, which margarine wins.

“Butter is back; saturated fat was never the problem.” This originated with a 2014 meta-analysis that found no clear link between saturated fat and heart disease. Later analyses pointed out that the trials and cohorts in it mostly compared saturated fat with refined carbohydrate, which is roughly a wash. When the comparison is saturated versus polyunsaturated fat, the benefit of the swap reappears consistently.

“Ghee is a cholesterol-free superfood.” Ghee contains about 33 milligrams of cholesterol per tablespoon and more saturated fat than butter. Its real advantages are heat tolerance and low lactose, not heart protection.

“Seed oils cause inflammation.” Randomized trials that raise dietary linoleic acid do not raise inflammatory markers, and cohorts link higher linoleic acid intake to lower cardiovascular risk. Reused, overheated frying oil is a separate and legitimate concern.

“Grass-fed butter is heart-healthy.” It has a slightly better fatty-acid mix and more vitamin K2, but it is still about two thirds saturated fat. Any benefit over conventional butter is unproven and small; the comparison with plant oils is unchanged.

How much fat is reasonable, and what to spread instead

Fat itself is not the enemy; total fat intake of 20 to 35 percent of calories is within every major guideline. The lever that moves LDL is the type of fat, and the lever that moves weight is total calories, so the practical aim is to shift the type without inflating the amount.

A workable daily picture for a typical adult looks like this: a tablespoon or two of olive or canola oil for cooking and dressings, nuts or seeds as snacks, fatty fish once or twice a week, and dairy fat used deliberately rather than by default. Within that frame, a thin spread of butter on weekend toast or a spoon of ghee in a curry barely registers against the NHS saturated-fat ceiling of 20 to 30 grams. Butter on every slice, in every pan, and melted over every vegetable is a different diet.

Spreading alternatives with good evidence behind them include mashed avocado, nut butters without added hydrogenated fat, hummus, and extra-virgin olive oil used the Mediterranean way, drizzled rather than spread. Each replaces saturated with unsaturated fat and adds fiber or polyphenols that butter and margarine lack. For people specifically working on LDL, a plant-sterol spread is the only option in this category with trial-proven additional lowering, though it should be discussed with the clinician managing cholesterol.

The pattern the strongest evidence supports is the Mediterranean one: a diet built on vegetables, legumes, whole grains, fish and olive oil, in which butter is an occasional ingredient. The multi-year PREDIMED trial in Spain found about a 30 percent reduction in major cardiovascular events with that pattern supplemented by olive oil or nuts, the clearest randomized outcome result in the whole field of dietary fat.

When to see a doctor

Changing the spread on your toast is low-risk, but the reason people care about it, their heart and blood vessels, sometimes needs more than a grocery decision. A few situations call for a conversation with a clinician, and a few call for emergency care.

Call emergency services immediately for chest pain or pressure lasting more than a few minutes or spreading to the arm, neck, jaw or back; sudden shortness of breath; cold sweat with nausea or lightheadedness; or any sign of stroke such as sudden face drooping, arm weakness, slurred speech or loss of vision. These are not symptoms to manage with diet.

Book a routine appointment if you have never had your cholesterol checked. The American Heart Association and CDC suggest adults have a lipid panel from age 20, roughly every four to six years when risk is low, and more often with diabetes, high blood pressure, smoking, obesity, kidney disease or a family history of early heart disease. A parent or sibling who had a heart attack before 55 (men) or 65 (women), or very high LDL in the family, raises the possibility of familial hypercholesterolemia, an inherited condition that diet alone will not control and that affects children as well as adults.

Also seek advice if you notice yellowish fatty deposits around the eyelids or on tendons, if you are pregnant or breastfeeding and unsure about fat intake, or if you have a milk allergy and are considering ghee, which can still contain traces of milk protein.

If you already take a statin or another cholesterol-lowering medicine, do not stop or adjust it because a spread, an oil or an article suggests your diet can do the job. Dietary change supports medication; the decision to alter treatment belongs to the clinician who prescribed it, informed by your actual lipid results.

Frequently asked questions

Is margarine or butter better for your heart?

Soft margarine made from liquid plant oils is the better choice for heart health, because its unsaturated fat lowers LDL cholesterol compared with butter’s saturated fat, a finding replicated in randomized feeding trials. Modern margarine contains no industrial trans fat. Butter can still fit a balanced diet in small amounts, used as a flavoring rather than a daily cooking fat.

What are the real ghee benefits, and is ghee healthier than butter?

Ghee’s proven benefits are a high smoke point of about 250°C and very low lactose, which makes it useful for high-heat cooking and for people with lactose intolerance. It is not healthier than butter for the heart: it contains slightly more saturated fat per spoon, and claims about butyrate or arterial protection rest on small or animal studies rather than human trials.

Is margarine cheaper than butter?

Price varies widely by region, brand and whether the product is a basic spread or a specialty olive-oil or plant-sterol version, so no single answer holds everywhere, and this guide focuses on nutrition rather than cost. What the evidence does say is that the nutritional advantage lies in the fat profile, not the price tag, and olive or canola oil used for cooking offers the same lipid benefit as a premium spread.

Is margarine a natural food?

Margarine is a manufactured food made from refined plant oils, water, salt, emulsifiers and often added vitamins and plant-based colorants. Butter and ghee are also processed, through pasteurizing, churning and heating, just with older methods. Processing alone does not predict health effects; saturated fat is natural and raises LDL, while the one harmful margarine ingredient, partially hydrogenated oil, has been removed from US products.

Which is better for cooking, butter or oil?

Oil is the better everyday cooking fat. Olive, canola and similar oils are mostly unsaturated, lower LDL compared with butter in trials, and tolerate higher heat without scorching. Butter burns around 150°C because of its milk solids, so keep it for finishing sauces, baking and toast. Ghee handles high heat well but shares butter’s saturated-fat profile, so use it where its flavor is essential.

Can I replace butter with margarine in baking?

Yes, if you use a stick margarine with about 80 percent fat, which behaves like butter in cookies, cakes and pastry. Soft tub spreads contain more water, often 40 percent or more, and will make cookies spread thin and pastry tough. For frying, margarine spits and burns, so choose oil instead. Swap at equal quantities; doubling the amount cancels most of the benefit.

Does margarine still contain trans fat?

Margarine sold in the United States no longer contains industrial trans fat. The FDA withdrew the safe status of partially hydrogenated oils in 2015 and the phase-out was complete by 2021. Because a label can read 0 grams if a serving holds under 0.5 grams, check that the ingredient list has no partially hydrogenated oil; in current spreads it almost never does.

Is grass-fed butter good for cholesterol?

Grass-fed butter has slightly more omega-3 fat and vitamin K2 than conventional butter, but it remains roughly two thirds saturated fat and raises LDL compared with plant oils in the same way. No trial shows a meaningful heart benefit over regular butter. If you prefer its flavor, use it in the same modest amounts you would use any butter.

What did the 2025 butter study actually find?

The March 2025 JAMA Internal Medicine analysis followed about 221,000 US adults for up to 33 years. People eating the most butter had around 15 percent higher mortality than those eating the least, while the heaviest plant-oil users had about 16 percent lower mortality. Because it is observational, it shows association, not cause, but it aligns with randomized evidence on LDL and heart events.

Who should talk to a doctor before changing fats in their diet?

Anyone who takes a cholesterol-lowering medicine should not adjust it on the basis of dietary changes without talking to their prescriber. People with a family history of early heart disease, very high LDL, diabetes, kidney disease or a milk allergy also benefit from personalized advice. Adults who have never had a lipid panel should ask for one; guidelines suggest screening from age 20.

References

• World Health Organization: Healthy diet fact sheet
• MedlinePlus: Dietary fats explained

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.