LDL cholesterol is one of the clearest findings Replacing saturated fat with polyunsaturated fat lowers LDL cholesterol in controlled feeding studies. LDL is a causal risk factor in atherosclerotic cardiovascular disease.

Replacement matters Replacing saturated fat with refined starch or sugar is not equivalent to replacing it with unsaturated fat. WHO guidance therefore emphasizes both limiting saturated fat and improving replacement quality.

What can we say confidently? Replacing part of saturated fat intake with polyunsaturated fat lowers LDL cholesterol and is supported by major dietary guidelines. It is less appropriate to promise a fixed percentage reduction in cardiovascular events for an individual.

Everyday Lipid takeaway When choosing between fats, shifting part of the diet from saturated toward unsaturated fats is the better-supported direction for cardiovascular health.

References - WHO. Saturated fatty acid and trans-fatty acid intake for adults and children, 2023. - WHO. Healthy diet, updated 2026.