Butter vs. margarine: New science reshapes the age-old fat debate

The long-running debate over butter and margarine has taken a new turn. Experts now focus less on whether fats come from animals or plants and more on their specific fatty acid profiles. Recent studies and guidelines have reshaped advice on which spread might be healthier—and for whom.

Butter contains a high proportion of saturated fats, which can increase LDL cholesterol if eaten in large amounts. It does, however, naturally supply fat-soluble vitamins A, D, and E. Margarine, on the other hand, is often made from plant oils and packed with unsaturated fats, including omega-3 and omega-6.

The type of oil used in margarine makes a difference. Rapeseed or flaxseed oil offers better nutritional value than palm or coconut fat. Some margarines even include plant sterols, which help block cholesterol absorption and lower LDL levels. A 2024 study also found that unsaturated fats in margarine may reduce harmful visceral fat.

For people with heart disease or lipid disorders, a high-quality plant-based margarine could be the better choice. Yet both spreads remain calorie-dense, so moderation is key. The German Nutrition Society advises keeping saturated fats below 10 percent of daily calories.

Meanwhile, the US government's 2025 dietary guidelines now recommend more animal proteins (1.2–1.6g per kg of body weight) and full-fat dairy, prioritising meat over plant sources. This contrasts with Germany's DGE, which still promotes plant-based foods and limits animal products. The DGE has criticised the US changes but will not adopt them for German consumers.

The latest research suggests margarine may offer advantages for heart health, depending on its ingredients. Butter provides natural vitamins but carries risks from saturated fats. Guidelines continue to evolve, with different countries taking opposing stances on animal versus plant-based fats. For now, the best choice depends on individual health needs and dietary balance.