Margarine is generally the better choice for heart health, primarily because it contains far less saturated fat than butter. But the gap between the two has narrowed and widened over the decades, and the real answer depends on which margarine you pick. A tub of soft margarine made from olive or canola oil is a genuinely healthier swap. A cheap stick margarine with a long ingredient list offers less of an advantage.
How the Fat Profiles Compare
Butter is about 63% saturated fat. A single tablespoon delivers roughly 7 grams of saturated fat and 30 milligrams of cholesterol. The American Heart Association’s 2026 dietary guidance recommends keeping saturated fat below 10% of your total daily calories, which works out to about 22 grams on a 2,000-calorie diet. Two tablespoons of butter on your morning toast gets you more than halfway there before you’ve eaten anything else.
Margarine flips that ratio. A typical stick margarine is roughly 47% monounsaturated fat and 29% polyunsaturated fat, with much less saturated fat. Soft tub and liquid margarines skew even further toward unsaturated fats. These are the same types of fat found in olive oil, nuts, and avocados, and they have well-established benefits for blood cholesterol levels.
What the Research Shows for Heart Health
In controlled feeding trials comparing the two, people who ate margarine instead of butter saw their total cholesterol drop by 3.5% to 5.4% and their LDL (“bad”) cholesterol drop by 4.9% to 6.7%. Margarines rich in polyunsaturated fats produced the bigger improvements. Neither margarine nor butter had a meaningful effect on HDL (“good”) cholesterol or triglycerides, so the advantage of margarine comes specifically from lowering LDL.
Those percentage drops might sound modest, but they add up over years. Sustained reductions in LDL cholesterol are one of the most reliable ways to lower long-term cardiovascular risk. If you eat butter or margarine daily, the cumulative difference matters.
The Trans Fat Problem Is Mostly Solved
For years, margarine’s reputation suffered because of trans fats. Older margarines were made by pumping hydrogen into vegetable oils to make them solid, a process called partial hydrogenation that created artificial trans fats. These turned out to be worse for your heart than saturated fat, raising LDL and lowering HDL at the same time.
That era is over. The FDA determined in 2015 that partially hydrogenated oils were no longer safe for use in food and set a final compliance date of January 1, 2021, for manufacturers to reformulate. The agency also revoked a decades-old authorization that had specifically allowed partially hydrogenated oils in margarine. Modern margarines use a different process called interesterification, which rearranges the structure of plant-based fats to achieve a spreadable texture without producing trans fats at all.
If you’re buying margarine in the U.S. today, it should contain zero grams of trans fat. Check the label to confirm, but this is no longer the dealbreaker it once was.
Where Butter Has a Small Edge
Butter does contain fat-soluble vitamins, including vitamin A, small amounts of vitamin D, and vitamin K. A tablespoon provides roughly 350 IU of vitamin A, which is a meaningful contribution to your daily intake. It also has a richer flavor that many people prefer for baking and finishing dishes.
That said, most margarines are fortified with vitamins A and D to match or exceed what butter provides naturally. Some specialty margarines also contain added plant sterols, compounds that actively block cholesterol absorption in the gut. Clinical trials have shown that consuming 1.3 to 3 grams of plant sterols per day, often delivered through fortified margarine, can meaningfully reduce blood cholesterol levels. The FDA and European food safety authorities both recognize this benefit.
Neither One Drives Inflammation
One common concern is that margarine’s vegetable oils might promote inflammation. A study of moderately high-cholesterol adults tested diets where two-thirds of the fat came from different sources, including butter, soft margarine, stick margarine, and soybean oil. None of the fat types had any effect on C-reactive protein, a key marker of inflammation in the body. At normal dietary amounts, neither butter nor margarine appears to be a significant driver of inflammatory responses.
Cooking and Baking Differences
Butter has a smoke point of about 350°F, which makes it fine for sautéing over medium heat but prone to burning at higher temperatures. Margarine handles heat better, with smoke points ranging from 400°F to 570°F depending on the source oils. For high-heat cooking like stir-frying, margarine or a dedicated cooking oil is a more practical choice.
For baking, butter contributes flavor, moisture, and a specific texture that margarine doesn’t perfectly replicate. Many bakers prefer butter for pastries, cookies, and pie crusts where that richness is the point. Margarine works well in recipes where fat plays a structural role rather than a flavor role, like muffins or quick breads.
How to Choose the Right Margarine
Not all margarines are equal. The healthiest options share a few traits:
- Soft tub or liquid form. These contain less saturated fat than stick margarine because they don’t need to be as firm.
- A short ingredient list. Look for one where a liquid vegetable oil (olive, canola, avocado) is the first ingredient.
- Zero trans fat. This should be standard now, but verify on the nutrition label.
- Added plant sterols (optional). If lowering cholesterol is a priority, sterol-fortified spreads offer an extra benefit beyond just swapping saturated for unsaturated fat.
If you love butter and eat it sparingly, a thin scrape on toast or a small amount in cooking isn’t going to derail your health. The concern is with heavy, habitual use. Replacing butter with a quality margarine as your everyday spread is one of the simpler dietary swaps that can improve your cholesterol profile over time, without changing much about how you eat.