Modern soft margarine is generally a better choice for your heart than butter, but not all margarines are equal. A tablespoon of butter contains about 7 grams of saturated fat, while the same amount of soft tub margarine has just 0.5 to 2 grams. That difference matters because saturated fat raises LDL cholesterol, the kind that builds up in artery walls. The real answer depends on which type of margarine you’re choosing and what it’s made from.
Why Margarine’s Reputation Was Damaged
For decades, most margarine was made with partially hydrogenated oils, a process that created trans fats. Trans fats turned out to be even worse for heart health than the saturated fat in butter, raising LDL cholesterol while simultaneously lowering HDL (the protective kind). This gave margarine a deservedly bad name through the 1980s and 1990s.
That changed in 2015, when the FDA revoked the “generally recognized as safe” status of partially hydrogenated oils. The agency specifically revoked prior approvals for their use in margarine, shortening, and baked goods. Today, trans fats from partial hydrogenation are essentially gone from the margarine supply. If you’re still thinking of margarine as a trans fat delivery vehicle, you’re remembering a product that no longer exists on store shelves.
Tub Margarine vs. Stick Margarine
The format of the margarine tells you something important about its fat composition. The more solid a margarine is at room temperature, the more saturated fat it contains. Stick margarines need to hold their shape, so manufacturers use oils that are more saturated or processed to be firmer. Soft tub margarines stay spreadable because they’re made primarily from liquid vegetable oils, which are higher in polyunsaturated and monounsaturated fats.
A large study of over 69,000 postmenopausal women found that swapping just one teaspoon per day of stick margarine for tub margarine was associated with a 9% lower risk of heart attack. Among women who used only one type of spread, the reduction was even more pronounced: a 13% lower risk. Replacing butter with tub margarine also showed benefits, with an 8% lower heart attack risk in that same single-source group. The pattern was consistent across other cardiovascular outcomes, including total coronary heart disease and stroke, though the effects were smaller for those endpoints.
The takeaway is straightforward: if you use a spread, soft tub margarine made from liquid vegetable oils is the better option for your heart.
How the Fats in Margarine Affect Cholesterol
The polyunsaturated fats found in most tub margarines (from oils like canola, soybean, or sunflower) lower LDL cholesterol through a specific mechanism in the liver. These fats increase the number of LDL receptors on liver cells, which pull more LDL particles out of the bloodstream. Saturated fats do the opposite, reducing the liver’s ability to clear LDL. This is why the American Heart Association recommends replacing saturated fat with unsaturated fat from plant-based oils, noting strong evidence that this substitution reduces cardiovascular and all-cause mortality.
The AHA’s position is clear: dairy fat, while possibly slightly less harmful than other sources of saturated fat, is “far less beneficial than plant-based fats, especially polyunsaturated fatty acids.” This puts standard tub margarine made from vegetable oils ahead of butter for heart health.
Sterol-Fortified Margarines
Some margarines are fortified with plant sterols or stanols, compounds naturally found in small amounts in grains, nuts, and vegetables. These work by blocking cholesterol absorption in the gut. At a dose of about 2 grams per day (typically two to three servings of the fortified spread), studies show meaningful LDL reductions. People aged 50 to 59 saw an average 14% drop in LDL cholesterol. Younger adults also benefited, with reductions of 9% to 11% depending on age group.
These products are designed for people who already have elevated cholesterol or who want an extra edge beyond dietary changes alone. They’re not necessary for everyone, but for the right person, they can produce a clinically significant improvement without medication.
What to Look for on the Label
Not every margarine earns a heart-healthy label. When choosing one, look for these qualities:
- Liquid vegetable oil as the first ingredient: Canola, olive, soybean, or sunflower oil are common and beneficial choices.
- Low saturated fat: Aim for 1 gram or less per tablespoon. Tub margarines typically hit this mark.
- No partially hydrogenated oils: These are largely gone, but check the ingredient list to be sure, especially with off-brand or imported products.
- Minimal ingredient list: Some margarines contain emulsifiers like polysorbate 80 or carboxymethylcellulose, which have been linked in lab studies to reduced gut microbiome diversity and increased inflammation markers. Lecithin, by contrast, appears to have anti-inflammatory effects and is considered safe without a set intake limit. Simpler formulations with fewer additives are preferable.
Cooking With Margarine
Margarine works well for spreading and light sautéing, but deep-frying with it raises concerns. When vegetable-oil-based margarine is heated to high temperatures (around 180°C or 356°F), it produces airborne particles and chemical byproducts that cause oxidative stress. Research on frying fumes from palm-oil-based margarine found evidence of airway damage and inflammation even at relatively low exposure levels. For high-heat cooking, using a liquid oil with a higher smoke point (like avocado or refined canola oil) is a better choice than margarine.
For everyday use like spreading on toast, melting over vegetables, or light pan cooking, margarine performs fine and doesn’t pose these concerns. The fume issue is specific to prolonged high-heat applications like deep frying.
How Much Is Reasonable
There’s no specific daily limit for margarine, but the broader goal is keeping total saturated fat below about 5% to 6% of your daily calories if you’re managing cholesterol. For most people, that translates to roughly 11 to 13 grams of saturated fat per day. Since a tablespoon of soft tub margarine contributes only 0.5 to 2 grams toward that budget, moderate use fits comfortably within a heart-healthy diet. A tablespoon or two per day as part of meals is a reasonable amount that the research supports as beneficial compared to the same quantity of butter.
The heart health benefits of margarine aren’t really about margarine itself being a superfood. They come from what you’re not eating when you choose it over butter or other sources of saturated fat. Replacing saturated fat with unsaturated fat, consistently, over years, is one of the most well-supported dietary strategies for reducing cardiovascular risk.