Seed Oils: Should You Switch to Butter?

What It Covers

Science Vs examines whether seed oils like canola and soybean oil are dangerous and saturated fats like butter are healthy, testing claims against nutrition research involving cholesterol studies, inflammation markers, and mortality data.

Key Questions Answered

• •Butter health effects: Research tracking 600,000 people found butter increased premature death risk by only 1%, showed zero link to heart disease, and slightly reduced diabetes risk by 4%—far less harmful than previously believed.
• •Cholesterol particle size: Not all LDL cholesterol equally damages arteries. Smaller particles penetrate artery walls more easily than larger ones. Saturated fat raises larger, less dangerous LDL particles, explaining why butter shows neutral health effects despite raising cholesterol.
• •Seed oil inflammation claims: Studies testing thousands of muffins made with sunflower oil versus palm oil found no increase in inflammatory markers after eight weeks. Swedish research analyzing buttock fat samples from 800 men showed higher seed oil consumption correlated with longer lifespan.
• •Saturated fat replacement: Meta-analysis of 50 randomized trials involving 24,000 people demonstrates replacing saturated fat with polyunsaturated seed oils reduces cardiovascular disease risk—the opposite of current anti-seed-oil diet trends promoting butter and bacon.