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#515: Does Dietary Fat Quality Causally Affect Atherosclerosis Risk? – Jacob Christensen, PhD

Sigma Nutrition Radio

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Understanding Dietary Fat Quality and its Impact on Blood Lipids

The quality of dietary fat is determined by the types and proportions of fats consumed, including saturated fat, monounsaturated fat, polyunsaturated fats, dietary cholesterol, and trans fatty acids. Specific fatty acids such as loric acid, meuristic acid, pulmitic acid, oleic acid, linoleic acid, alpha linoleic acid, EPA, and DHA play key roles in influencing blood lipids. Research focuses on examining these specific fatty acids rather than evaluating saturated fat as a whole, across various types of studies including feeding studies, control trials, mechanistic work, and epidemiology. Consistent findings reveal that higher proportions of saturated fat combined with lower polyunsaturated fat increase blood lipids, while replacing saturated fat with polyunsaturated fat leads to decreases in blood lipids.

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