Animal fats and cardiovascular disease
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Animal Fats and Cardiovascular Disease Risk
Animal Fat Intake and Cardiovascular Disease Mortality
Large-scale studies have found that higher intake of animal fats—including those from dairy and eggs—is linked to an increased risk of both overall mortality and cardiovascular disease (CVD) mortality. In contrast, replacing animal fats with plant-based fats, especially those from grains and vegetable oils, is associated with a lower risk of CVD and overall mortality. Specifically, substituting 5% of energy from animal fat with plant fat can reduce CVD mortality risk by 5% to 30% .
Monounsaturated Fats: Plant vs. Animal Sources
Monounsaturated fatty acids (MUFAs) from plant sources are associated with a lower risk of coronary heart disease (CHD) when they replace saturated fats, refined carbohydrates, or trans fats. However, MUFAs from animal sources do not show the same benefit. Replacing both saturated fats and animal-based MUFAs with plant-based MUFAs further reduces CHD risk, highlighting the importance of fat source .
Saturated Fatty Acids and Their Impact
Most studies indicate that long-chain saturated fatty acids (found mainly in meat and cheese) are associated with a higher risk of CVD, while short- and medium-chain saturated fatty acids may have a neutral or even beneficial effect. Importantly, the health impact of saturated fat depends on what macronutrient replaces it in the diet. Replacing saturated fats with plant-based proteins, unsaturated fats, or complex carbohydrates is linked to reduced or neutral CVD risk, while replacement with refined carbohydrates or animal protein increases risk 6910.
Dairy Fat and Cardiovascular Disease
The relationship between dairy fat and CVD is complex. Some studies show that dairy fat intake is not significantly related to CVD risk, but replacing dairy fat with vegetable fat is associated with a lower risk of CVD. Fermented dairy products like yogurt and cheese may have neutral or even positive effects on cardiovascular health, while milk generally shows a neutral effect 58.
Dietary Patterns and Food Sources
The overall dietary pattern and the source of fats are crucial. Diets high in animal fats, especially those rich in saturated fatty acids, are linked to higher CVD risk. In contrast, diets emphasizing vegetable oils, fatty fish (rich in omega-3 fatty acids), and plant-based foods are associated with lower CVD risk. Guidelines recommend limiting animal fats and favoring unsaturated fats from plant sources and fish 347.
Conclusion
The evidence consistently shows that high intake of animal fats, particularly those rich in long-chain saturated fatty acids, increases the risk of cardiovascular disease. Replacing animal fats with plant-based fats, especially from grains, vegetable oils, and fatty fish, lowers this risk. The type and source of dietary fat, as well as the overall dietary pattern, play a critical role in cardiovascular health.
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