Key Takeaways
- Butter is a traditional whole food fat made from cream and used for centuries in cooking.
- Evidence linking butter or saturated fat directly to heart disease remains mixed and debated.
- Large reviews often find weak or neutral associations between butter intake and major health outcomes.
- Minnesota and Sydney trials showed replacing animal fats with seed oils did not improve survival.
- The type and quality of fats in whole diets matters more than focusing on butter alone.
Why Butter Fits
A Real Food Fat
Butter comes from milk cream that is churned until the fat comes together. That is a short, old food process. There is no long list of steps, bleach, gums, or lab made add ons. Butter also comes with the food matrix of dairy fat. A food matrix means the full food package, not just one number on a chart. Research on dairy fat has often looked more mixed than old anti butter claims would suggest (Yakoob et al., 2014; Warensjö et al., 2010; Kratz et al., 2012).
Nutrients
Butter provides more than just calories from fat. It also contains several nutrients that come from milk fat. Butter supplies fat soluble vitamins such as vitamin A and small amounts of vitamin K2, which the body absorbs best when eaten with fat. It also contains butyrate, a short chain fatty acid that cells in the colon can use as fuel.
Milk fat also carries small amounts of minerals and trace nutrients that occur naturally in dairy. These compounds appear together in the natural structure of the fat, sometimes called the dairy fat matrix.
Research that measures blood markers of dairy fat has found mixed or neutral links with heart disease risk, suggesting that dairy fat foods like butter behave differently from isolated fats studied alone (Yakoob et al., 2014; Warensjö et al., 2010).
How Seed Oils Took Over
The Big Swap
In the last century, seed oils grew fast. Soy, corn, safflower, and other oils became cheap to make in huge amounts. At the same time, public diet advice turned against animal fat. Some reviews found that lower saturated fat intake helped in some study sets, yet those results depend on what food took its place and how the study was done (Hooper et al., 2020; Mozaffarian et al., 2010).
Other pooled reviews did not find a strong, direct link between saturated fat intake and heart disease events in the way the old public story suggested (Chowdhury et al., 2014; Siri-Tarino et al., 2010).
What Got Lost
When all fats are put in one pile, the food picture gets blurred. Butter on eggs is not the same as deep fried snack food in used oil. A home meal built from meat, eggs, dairy, and fruit is not the same as a day of cereal, chips, buns, and sweet drinks. That is why butter should be judged in real meals, not by fear alone. The old low fat push often missed that.
Minnesota & Sydney Trials
Minnesota Coronary Experiment
The Minnesota Coronary Experiment ran from 1968 to 1973. It tested what would happen when saturated fat was replaced with linoleic acid rich oils in place of animal fats. Linoleic acid is a main omega 6 fat in many seed oils.
The later re analysis is why this study still gets so much attention. The diet did lower serum cholesterol, but that did not turn into better survival in the recovered data set (Ramsden et al., 2016). In older adults, the paper found that a bigger drop in serum cholesterol was linked with a higher, not lower, risk of death.
For years, people were told that if a food change lowers cholesterol, the case is closed. Minnesota showed that the story can be more complex. A lower lab number does not always mean a better real world result. A swap away from butter and other animal fats did not clearly save lives in this trial, even though the blood marker changed.
Sydney Diet-Heart Study
The Sydney Diet-Heart Study ran from 1966 to 1973. Men who had already had a heart event were told either to keep their usual diet or to replace animal fats with safflower oil and safflower oil margarine. Safflower oil is very high in linoleic acid.
When the data were later recovered and re studied, the group told to use more safflower oil had higher rates of death from all causes, heart disease, and coronary disease (Ramsden et al., 2013).
Replacing old fats with a seed oil rich in linoleic acid did not bring the hoped for gain in this trial. In fact, the result went the other way. That is why Sydney still lands with force today. It directly tested the kind of swap that shaped anti butter advice, and the result was poor.
Importance of These Trials
Minnesota and Sydney do not answer every diet question. They were done a long time ago. Yet they matter because they tested the big idea behind the butter scare. Replace animal fat with seed oils and health will improve. These trials did not give clean support to that claim. They showed that the type of oil matters, and that a drop in cholesterol does not settle the whole case.
What About Big Reviews?
Mixed, Not Simple
Large reviews of butter intake have often found small or neutral links with death, heart disease, and diabetes (Pimpin et al., 2016). Other work on high fat dairy also found mixed findings, not a clear harm story (Kratz et al., 2012; Vissers et al., 2019).
Some reviews do support replacing saturated fat with polyunsaturated fat in some settings (Hooper et al., 2020; Mozaffarian et al., 2010). Even so, the full record is not one note.
Other large analyses found weak or unclear links between saturated fat and major disease end points (de Souza et al., 2015; Chowdhury et al., 2014). The strongest case is not that butter is bad. The stronger case is that food quality and food type matter far more than old fear of butter alone.
How To Use Butter Well
Butter works best in meals built from real food. Eggs cooked in butter. Steak with a pat of butter. Fish with butter and herbs. These are simple meals with clear food value. Butter also helps people feel full. That can make it easier to eat one to three solid meals in a day instead of grazing on snack food.
The real risk to good eating is often not butter. It is the mix of seed oils, carbohydrates and ultra processed food. Butter used with real food is very different from butter added to junk food.
A simple guide helps here:
- Use butter with meals made from meat, eggs, dairy, fish, and other basic foods.
- Skip fake spreads and highly processed foods built around refined oils.
Some large reviews found weak or neutral links between butter or saturated fat and heart disease, while old re analyses of major oil swap trials raised hard questions about that whole model (Pimpin et al., 2016; de Souza et al., 2015; Ramsden et al., 2016). Butter does not need to be sold as a superfood. It is enough to say butter is a traditional fat, the case against it is far from settled, and old seed oil swap trials did not give it a fair reason to be pushed off the plate.
Before changing your diet, supplements, or health routine, talk with a licensed healthcare professional. For any health concerns or questions about a medical condition, get guidance from a physician or another appropriately trained clinician.
FAQs
Is butter better than margarine?
In many cases, yes. Butter is a simple food made from cream. Margarine is a factory product, and old forms often had trans fats. Butter is still the more traditional food.
Does butter raise cholesterol?
Butter can raise blood cholesterol in some people. Still, the full research record does not show a clear case that butter itself drives poor health outcomes in a simple or direct way.
What did the Minnesota Coronary Experiment show?
It showed that replacing animal fat with linoleic acid rich oils lowered serum cholesterol, but the recovered data did not show better survival.
What did the Sydney Diet-Heart Study show?
It found that men told to replace animal fats with safflower oil and safflower margarine had higher death rates in the later re analysis.
Can butter fit in a healthy diet?
Yes. Butter fits well in a diet built from whole foods, solid meals, and fewer processed products.
Research
Pimpin, L. et al. (2016) ‘Is butter back? A systematic review and meta-analysis of butter consumption and risk of cardiovascular disease, diabetes, and total mortality’, PLOS ONE, 11(6), e0158118. Available at: https://doi.org/10.1371/journal.pone.0158118
de Souza, R.J. et al. (2015) ‘Intake of saturated and trans unsaturated fatty acids and risk of all cause mortality, cardiovascular disease, and type 2 diabetes: systematic review and meta-analysis of observational studies’, BMJ, 351, h3978. Available at: https://doi.org/10.1136/bmj.h3978
Ramsden, C.E. et al. (2016) ‘Re-evaluation of the traditional diet-heart hypothesis: analysis of recovered data from the Minnesota Coronary Experiment (1968–73)’, BMJ, 353, i1246. Available at: https://doi.org/10.1136/bmj.i1246
Yakoob, M.Y. et al. (2014) ‘Circulating biomarkers of dairy fat and risk of incident coronary heart disease in US men and women in two large prospective cohorts’, Circulation, 129(12), pp. 1315–1323. Available at: https://doi.org/10.1161/CIRCULATIONAHA.113.006607
Warensjö, E. et al. (2010) ‘Biomarkers of milk fat and the risk of myocardial infarction in men and women: a prospective, matched case-control study’, American Journal of Clinical Nutrition, 92(1), pp. 194–202. Available at: https://doi.org/10.3945/ajcn.2009.27680
Kratz, M. et al. (2012) ‘The relationship between high-fat dairy consumption and obesity, cardiovascular, and metabolic disease’, European Journal of Nutrition, 52(1), pp. 1–24. Available at: https://doi.org/10.1007/s00394-012-0418-1
Hooper, L. et al. (2020) ‘Reduction in saturated fat intake for cardiovascular disease’, Cochrane Database of Systematic Reviews, 5, CD011737. Available at: https://doi.org/10.1002/14651858.CD011737.pub2
Mozaffarian, D. et al. (2010) ‘Effects on coronary heart disease of increasing polyunsaturated fat in place of saturated fat: a systematic review and meta-analysis of randomized controlled trials’, PLOS Medicine, 7(3), e1000252. Available at: https://doi.org/10.1371/journal.pmed.1000252
Chowdhury, R. et al. (2014) ‘Association of dietary, circulating, and supplement fatty acids with coronary risk: a systematic review and meta-analysis’, Annals of Internal Medicine, 160(6), pp. 398–406. Available at: https://doi.org/10.7326/M13-1788
Siri-Tarino, P.W. et al. (2010) ‘Meta-analysis of prospective cohort studies evaluating the association of saturated fat with cardiovascular disease’, American Journal of Clinical Nutrition, 91(3), pp. 535–546. Available at: https://doi.org/10.3945/ajcn.2009.27725
Ramsden, C.E. et al. (2013) ‘Use of dietary linoleic acid for secondary prevention of coronary heart disease and death: evaluation of recovered data from the Sydney Diet-Heart Study and updated meta-analysis’, BMJ, 346, e8707. Available at: https://doi.org/10.1136/bmj.e8707
Vissers, L.E.T. et al. (2019) ‘Dairy product intake and risk of type 2 diabetes in EPIC-InterAct: a case-cohort study’, American Journal of Clinical Nutrition, 109(4), pp. 1059–1069. Available at: https://doi.org/10.1093/ajcn/nqy242
Mensink, R.P. et al. (2003) ‘Effects of dietary fatty acids and carbohydrates on the ratio of serum total to HDL cholesterol and on serum lipids and apolipoproteins: a meta-analysis of 60 controlled trials’, American Journal of Clinical Nutrition, 77(5), pp. 1146–1155. Available at: https://doi.org/10.1093/ajcn/77.5.1146
Schwingshackl, L. and Hoffmann, G. (2014) ‘Monounsaturated fatty acids and risk of cardiovascular disease: synopsis of the evidence available from systematic reviews and meta-analyses’, BMC Medicine, 12, 89. Available at: https://doi.org/10.1186/1741-7015-12-83
Estruch, R. et al. (2013) ‘Primary prevention of cardiovascular disease with a Mediterranean diet’, New England Journal of Medicine, 368(14), pp. 1279–1290. Available at: https://doi.org/10.1056/NEJMoa1200303
Dehghan, M. et al. (2017) ‘Associations of fats and carbohydrate intake with cardiovascular disease and mortality in 18 countries from five continents (PURE): a prospective cohort study’, The Lancet, 390(10107), pp. 2050–2062. Available at: https://doi.org/10.1016/S0140-6736(17)32252-3
Guasch-Ferré, M. et al. (2015) ‘Dietary fat intake and risk of cardiovascular disease and all-cause mortality in a population at high risk of cardiovascular disease’, Journal of the American College of Cardiology, 65(10), pp. 1003–1014. Available at: https://doi.org/10.1016/j.jacc.2015.01.054
Astrup, A. et al. (2011) ‘The role of reducing intakes of saturated fat in the prevention of cardiovascular disease: where does the evidence stand in 2010?’, American Journal of Clinical Nutrition, 93(4), pp. 684–688. Available at: https://doi.org/10.3945/ajcn.110.004622
Jakobsen, M.U. et al. (2009) ‘Major types of dietary fat and risk of coronary heart disease: a pooled analysis of 11 cohort studies’, American Journal of Clinical Nutrition, 89(5), pp. 1425–1432. Available at: https://doi.org/10.3945/ajcn.2008.27124
Hu, F.B. et al. (1997) ‘Dietary fat intake and the risk of coronary heart disease in women’, New England Journal of Medicine, 337(21), pp. 1491–1499. Available at: https://doi.org/10.1056/NEJM199711203372102
