The acute effect of oleic- or linoleic acid-containing meals on appetite and metabolic markers; a pilot study in overweight or obese individuals
journal contributionposted on 2018-09-26, 00:00 authored by Shaan NaughtonShaan Naughton, Erik D Hanson, Michael L Mathai, Andrew J McAinch
Despite the abundance of plant-derived fats in our diet, their effects on appetite, and metabolic markers, remain unclear. This single-blinded 3-way cross-over pilot study aimed to investigate the ability of the two most abundant dietary plant-derived fats, oleic (OA) and linoleic (LA) acids, to modulate postprandial appetite and levels of circulating appetite and metabolic regulators in overweight/obese individuals. Meals were a high-carbohydrate control, a high-OA or a high-LA meal, and provided 30% of participants' estimated energy requirements. Meals were consumed after an overnight fast, with blood samples collected over 3¼ h. Appetite parameters were assessed via a validated visual analogue scale questionnaire. Hormones and other circulating factors were quantified using multiplex immunoassays. Eight participants (age 45.8 ± 3.6 (years), body mass index 32.0 ± 1.3 (kg/m²)) completed the study. All meals significantly increased fullness and reduced desire to eat. The control and high-OA meals significantly decreased prospective food intake. The high-LA meal increased ghrelin levels (p < 0.05), a hormone which encourages food intake. This was coupled with a significant acute increase in resistin levels, which impairs insulin signaling. Taken together, this study indicates that in overweight/obese individuals, high-LA meals may promote excess energy intake and alter glucose handling, though a larger cohort may be required to strengthen results.
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Publication classificationC1 Refereed article in a scholarly journal
Copyright notice2018, The Authors
appetite regulationdietary fatsghrelinlinoleic acidoleic acidsatietyScience & TechnologyLife Sciences & BiomedicineNutrition & DieteticsSERUM RESISTIN CONCENTRATIONSFOOD BALANCE SHEETSMIDDLE-AGED MENHIGH-FAT MEALSNUTRITION TRANSITIONINSULIN-RESISTANCEENERGY-METABOLISMCONTROLLED-TRIALSHORMONE-RELEASEHEALTHY OLDER