#6741. Different Ratios of Corn and Coconut Oil Blends in High-Fat Diets Influence Fat Deposition without Altering Metabolic Biomarkers in Male Rats

October 2026publication date
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Journal’s subject area:
Food Science;
Industrial and Manufacturing Engineering;
Chemistry (all);
Biotechnology;
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Abstract:
The effects of high-fat diets with the recommended dietary linoleic acid (LA) intake levels on health outcomes have not been studied extensively. This study investigated the effects of high-fat diets containing different weight ratios of coconut and corn oil with LA levels of <1.00% of energy (very low LA), 2.80% of energy (low LA), 5.80% of energy (moderate LA), and 9.70% of energy (high LA) on fat deposition and selected metabolic biomarkers of male Sprague-Dawley rats. Their initial and terminal body weights are recorded. Blood, adipose tissue, and liver samples are obtained for analysis after an 8-week feeding intervention. Compared with the very low-LA diet, the high-LA diet resulted in higher body weight gain and epididymal fat deposition. No significant differences are observed in liver-to-body weight ratio, blood glucose, visfatin, and leptin levels between the test diets. Serum tumor necrosis factor-alpha (TNF-?), insulin, and C-peptide levels do not significantly increase with the increase in dietary LA levels. High-LA diet results in higher LA levels in the liver and adipose tissue. It is concluded that a high-fat diet containing high LA levels induced body weight gain and epididymal fat deposition in rats but has no effect on selected metabolic biomarkers. Practical applications: Linoleic acid (LA) (C18:2) plays an important role as one of the nutritional elements to meet the daily essential fatty acid requirements. However, a full understanding is perplexed by the various ways that LA can be included in the diet when there is a recommendation to substitute saturated fatty acid (SFA), trans- or n-3 fatty acids intake. The data provide additional findings on the effects of excessive dietary intake of LA (C18:2) on fat deposition when different levels of SFAs are replaced.
Keywords:
coconut oil; corn oil; inflammation; linoleic acid; obesity

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