Association Between Trans-Fatty Acids and Inflammation Markers
Study Overview
A recent study has established a link between serum levels of trans-fatty acids and inflammatory markers, specifically high-sensitivity C-reactive protein (hs-CRP) and fibrinogen. This suggests that dietary trans-fatty acids could play a role in inflammation-related disorders, including diabetes mellitus and cardiovascular disease.
Understanding Trans-Fats
Trans-unsaturated fatty acids, commonly referred to as trans-fats, are unsaturated fatty acids that contain at least one double bond in the trans configuration within their hydrocarbon chains. They naturally occur in small quantities in certain meat and dairy products but are predominantly found in processed foods such as margarine, shortening, fried fast food, packaged snacks, and baked goods. The industrial process of hydrogenation, which adds hydrogen atoms to vegetable oils, is primarily responsible for the production of trans-fats, enhancing flavor and shelf life of food products.
Previous Research
Earlier studies have indicated a correlation between dietary intake of trans-fatty acids and an increase in systemic inflammatory markers. These markers serve as biological indicators, signaling that the body is either repairing damage or combating infections through inflammation. However, previous research often relied on food questionnaires and nutrient databases, which can introduce inaccuracies in estimating dietary trans-fat intake.
New Findings
The recent study, published in the Journal of Nutrition and Metabolism, took a more direct approach by measuring trans-fat levels in blood serum and correlating them with serum levels of hs-CRP and fibrinogen. Utilizing data from the US National Center for Health Statistics (NCHS) collected during the 1999-2000 National Health and Nutrition Examination Surveys, the study analyzed serum levels of several trans fatty acids, including trans-9-hexadecenoic acid, trans-9-octadecenoic acid, trans-11-octadecenoic acid, and trans-9-, trans-12-octadecadienoic acid.
Data Analysis
The analysis included 5,446 adults (2,550 men and 2,896 women) with a mean age of 47.1 years. Findings revealed that serum levels of hs-CRP and fibrinogen increased alongside total trans-fat levels. After adjusting for factors such as sex, race, education, marital status, body mass index, and smoking, it was found that specific trans fatty acids were significantly associated with elevated levels of inflammation markers.
Implications of the Study
These results support previous findings that link dietary trans-fat intake to increased inflammatory markers. Additional studies have shown that exposure of human endothelial cell cultures to trans-fats triggers a pro-inflammatory response by activating nuclear factor-kappa B (NF-kB), which subsequently enhances the expression of the pro-inflammatory protein intercellular adhesion molecule-1 (ICAM-1). Chronic inflammation is recognized as a key mechanism in the development of type 2 diabetes and cardiovascular disease.
Recommendations for Reducing Trans-Fats
The findings of this study underscore the importance of reducing dietary trans-fat consumption to mitigate chronic inflammation. Individuals can start by reviewing nutrition labels on packaged foods to select options with low or no trans-fats. Other practical steps include using non-hydrogenated margarine instead of shortening in baking, minimizing deep-fried food intake, and following a diet rich in whole grains, fruits, and vegetables.
Conclusion
Overall, the study highlights the potential health risks associated with trans-fat consumption and encourages dietary changes to promote better health outcomes.
Written by
Usha B. Nair, Ph.D.
References
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