The Role of Dietary Fat on Postprandial Endotoxemia in Healthy Adults

Study Overview
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Brief Summary
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The purpose of this study was to determine the effect of different dietary fats (saturated or unsaturated) on postprandial endotoxemia and systemic low grade acute inflammation. The investigators hypothesized that meals rich in saturated or n-6 fatty acids would increase postprandial endotoxemia but meals high in n-3 fatty acids would decrease postprandial endotoxemia.Participants were recruited via email and randomized to treatment meal in this single-blind, cross-over study. Each test session participants reported to the laboratory right away in the morning. An indwelling catheter was inserted into the participant non-dominant arm by a qualified nurse and a baseline blood draw was taken. The participant was then provided with one of four test meals (a porridge-type meal containing a different dietary fat), which they ate in entirety within 15 minutes. The participants remained in the laboratory for the next five and a half hours and were not allowed to consume any food or drink except water. During this time, further blood draws were taken at intervals of one hour for a total of five hours after the consumption of the test meal. Collected blood was processed on-site and the serum fraction collected and tested for endotoxin, inflammatory biomarkers, and metabolites.

Official Title
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Dietary Fat Affects Postprandial Serum Endotoxin Concentration in Healthy Adults

Conditions
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Endotoxemia

Intervention / Treatment
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* Other: Low-fat Treatment Meal
* Other: Saturated-fat Treatment Meal
* Other: N-3 fat Treatment Meal
* Other: N-6 fat Treatment Meal


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Aged between 18 and 40 years old; Willingness to eat test meals; Body mass index ≥ 19.9 ±0.8 and ≤ 24.9 ±0.8; Weight stable (< 2 kilogram weight change in the previous 3 months) Exclusion Criteria: Presence of acute or chronic disease; Use of tobacco products; Consumes more than 21 units of alcohol per week; Use of anti-inflammatory medication; History suggestive of macronutrient malabsorption

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 40 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Test Meal Saturated Fat<br>Saturated-fat Treatment Meal | Other: Saturated-fat Treatment Meal<br>* Isocaloric test meal that provided 35% fat with saturated fat (16 g).<br>|
| Experimental: Test Meal N-6 Fat<br>N-6 fat Treatment Meal. | Other: N-6 fat Treatment Meal<br>* Isocaloric test meal that provided 35% fat with n-6 (7.4 g).<br>|
| Experimental: Test Meal N-3 Fat<br>N-3 fat Treatment Meal. | Other: N-3 fat Treatment Meal<br>* Isocaloric test meal that provided 35% fat with n-3 (DHA = 500mg)<br>|
| Experimental: Test Meal Low-fat<br>Low-fat Treatment Meal. | Other: Low-fat Treatment Meal<br>* Isocaloric test meal that provided 20% fat.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Serum endotoxin concentration |  | Change from baseline every one hour, up to five hours | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Serum concentration of biomarkers of inflammation |  | Change from baseline every one hour, up to five hours | 
| Serum concentration of triglycerides, glucose, and non-esterified fatty acids |  | Change from baseline every one hour, up to five hours | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Inflammation, Endotoxemia, Lipopolysaccharide, Diet, Postprandial, Fat