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Lipids are an essential component of a balanced human diet. Triglycerides, which make up the majority of dietary lipids, are found in both saturated fats—commonly present in meat, dairy products, and certain tropical plants like coconut, and hydrogenated oils such as margarine and baking shortenings (trans fats)—and unsaturated fats, which are abundant in seeds, nuts, olive oil, and most vegetable oils. The main sources of cholesterol include egg yolks, various meats and organ...
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Related Experiment Video

Updated: Apr 29, 2026

Measuring Oral Fatty Acid Thresholds, Fat Perception, Fatty Food Liking, and Papillae Density in Humans
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Trans fatty acids: are the effects only marginal?

W C Willett1, A Ascherio

  • 1Department of Nutrition, Harvard School of Public Health, Boston, Mass. 02115.

American Journal of Public Health
|May 1, 1994
PubMed
Summary

Trans fatty acids, formed during partial hydrogenation of vegetable oils, raise bad cholesterol and lower good cholesterol. Increased intake is linked to coronary heart disease risk, necessitating regulatory action.

Area of Science:

  • Nutritional Science
  • Cardiovascular Health
  • Food Chemistry

Background:

  • Partial hydrogenation converts vegetable oils to solid fats, creating trans fatty acids.
  • Trans fatty acids negatively impact cholesterol levels: increasing LDL and decreasing HDL.
  • Epidemiological studies show a positive association between trans fatty acid intake and coronary heart disease.

Purpose of the Study:

  • To evaluate the causal relationship between trans fatty acid intake and coronary heart disease risk.
  • To highlight the public health implications of widespread consumption of partially hydrogenated fats.

Main Methods:

  • Review of metabolic and epidemiological studies on trans fatty acid effects.
  • Analysis of the link between dietary trans fatty acids and cardiovascular disease markers.

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Main Results:

  • Strong evidence indicates a causal relationship between trans fatty acid intake and coronary heart disease risk.
  • The near-universal consumption of partially hydrogenated fats in the US suggests substantial attributable deaths.

Conclusions:

  • Trans fatty acid consumption poses a significant risk to cardiovascular health.
  • Federal regulations should mandate trans fat content on food labels.
  • Reducing or eliminating partially hydrogenated fats in food manufacturing is recommended.