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United States Department of Agriculture

Agricultural Research Service

The Breathe Light Study

We are seeking volunteers to participate in a research study looking at how the amount of calories we eat affect the composition of our breath. We invite you to be in a study to develop a novel, non-invasive method that will provide personalized feedback during dietary interventions as a marker for compliance.

Why are we doing this study?

Advances in the area of breath analysis provide a new tool for assessing dietary compliance. This study is being done to develop a non-invasive, sensitive tool to detect changes in breath related to dietary compliance, energy balance, and substrate utilization during a weight-loss regimen.

The United States Department of Agriculture is funding this research study.

Who is eligible for this study?

Men and women between 18-65 years of age who are overweight or obese and

  • Free of major medical conditions including, but not limited to, diabetes
  • Women must not be pregnant and must be on contraception
  • Do not have allergies to foods to be used in the study (including but not limited to lactose intolerance/milk allergy)
  • Have not had gastrointestinal surgery
  • Are not pregnant or trying to become pregnant

Must be able to stay at the Grand Forks Human Nutrition Center for 11 days on 2 separate occasions
Must be willing to comply with study protocol

What is required of me for this study?

  • 11-day stay at the Grand Forks Human Nutrition Center on 2 separate occasions including 4 days spent in a metabolic chamber
  • Breath samples in collection bags prior to and following meals
  • Urine samples at several time points while in the metabolic chamber
  • Consume all meals prepared by research center staff with no outside food items

Will I get compensated for my time?

You may be compensated as much as $1,200.00 for participating.

Who can I call about this study?

If you have more questions please call 701-795-8396 or

Applications are online at:

Last Modified: 8/23/2016
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