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Phase IV

Yale Dietary Supplement and Weight Management Study

  • Study HIC#:2000028769
  • Last Updated:02/03/2022

Participate in weight loss research at Yale University

We are looking for research participants to help us understand the effects of a dietary supplement on weight loss and eating habits. Earn up to $890.00

We strive to explore if dietary fat intake in individuals with overweight and obesity will influence the weight loss outcomes following a gold standard behavioral weight loss intervention following OEA supplementation. This longitudinal study is 16-month long. You will be taking daily dietary supplement/placebo during the study and participate in a weight loss program that focuses on making sustainable lifestyle modifications.

What are the benefits of participation? 

  • Learning about healthy lifestyle & improved mental health.

How much will I be paid to participate?

  • Up to $890

Where does this study take place?

  • 9 sessions are in person. 12 are online.

How long is the study?

  • 16 months

For more details:

  • Age18 years - 55 years
  • GenderBoth
  • Start Date11/05/2020
  • End Date01/31/2026

Trial Purpose and Description

The primary objective is to test if fat intake moderates the ability of Oleoylthanolamide (OEA) to improve weight loss maintenance after the LEARN® weight loss program.

The proposed work takes a precision medicine approach to obesity treatment and focuses specifically on weight loss maintenance. We propose to optimize a stratification strategy, using neural, metabolic and behavioral measures to identify individuals who will maintain clinically significant weight loss by daily supplementation with the fatty acid amide, oleoylthanolamide (OEA) following a gold-standard behavioral weight loss program. We will also test a model underlying the efficacy of our intervention to provide insight for the further development of therapeutic avenues. Our first aim is to conduct a randomized double-blind placebo-controlled trial to determine if fat intake moderates the ability of OEA to improve weight loss maintenance after the (LEARN®) weight loss program. We predict fat intake will strongly moderate the ability of OEA to produce clinically significant weight loss and weight loss maintenance 4- and 12-months) after LEARN and that this should not be influenced by sex.

Our second aim is to test if the Dietary Fat and Sugar intake questionnaire (DFS) is associated with measures of saturated fat intake and to optimize a clinically useful stratification strategy. Towards this end we will: (1) perform a neuroimaging study to assess brain response to a high fat milkshake (2) assess blood-based biomarkers of fat intake and synthesis; and (3) collect dietary intake records and food frequency questionnaires (FFQs). We predict that (1) the DFS predicts measures of saturated fat intake (2) that baseline dorsal striatal (DS) response to milkshake predicts weight loss in the OEA but not the placebo group and that connectome based predictive modeling (CPM) reveals a "neural fingerprint" that predicts weight loss on OEA; and (3) LASSO regression will identify baseline measures that best predict outcome to inform selection of a practical clinical stratification recommendation.

Our third aim is to test a model of OEA effectiveness. We predict that weight loss outcome is associated with shifts in fat preference and intake and these effects are mediated by increases in DS response to milkshake in the OEA but not placebo group. We will also test whether HFD is associated with performance on reinforcement and cognitive measures or changes in energy expenditure or substrate utilization. If so, we will test whether these associations and their reversal by OEA contribute to outcome mediation.

Eligibility Criteria

We are looking for participants who meet the following criteria:

  • Between ages 18-55
  • With overweight/obesity (BMI > 25)
  • No dietary restriction
  • Willing to take dietary supplements
  • Willing to lose weight and make lifestyle modifications
  • No major psychiatric disorders
  • No chronic diseases (diabetes, hypertension, liver diseases)
  • Not currently taking oil-based supplements (ask if in doubt)
  • MRI safe (No metal in the body or claustrophobia)
  • Ability to participate for 16 months
  • No prior education is needed.

You may be asked to:

  • Take a dietary supplement everyday
  • Consume beverages and foods
  • Make judgements about foods, tastes, and smells
  • Complete questionnaires and computer tasks
  • fMRI scans
  • Record food intake and physical activity
  • Provide blood and saliva samples

Principal Investigator

Sub-Investigators

For more information about this study, contact:

Or contact the Help us Discover team on: