Study Type


Study Purpose

The purpose of this research study is to determine the effect of a slowly digesting starch on gut bacteria, sugar and fat metabolism, hunger hormones, and body fat in people with pre-diabetes.

About the Study

Are you ready for a little change?

Research shows some changes to the bacteria naturally found in your stomach and intestines improves insulin sensitivity, cholesterol levels, appetite, and other health factors. Certain bacteria in your large intestine can be enriched with a diet containing slowly digestible starch (SDS). This study will evaluate the effect of consuming a yogurt with SDS on changes to the bacteria levels in your large intestine, insulin sensitivity, and other health factors.

Study Design

Number of visits:

  • 3 Screening visits
  • 5 Clinic visits
  • 2 Overnight visits, each about 48 hours long

Study procedures:

  • DXA scan
  • MRS
  • Metabolic Chamber
  • Standard Meal Test
  • Blood draws

Eligible participantsĀ  will eat 2 servings of blueberry yogurt a day for 12 weeks while maintaining current exercise habits and weight. There are two 2-day inpatient stays: one before starting the yogurt

and one at the end of the 12 week period. All study related food and health tests will be provided at no cost to participants.

Study Qualifications

  • Age: 35-75 years old
  • BMI: 27 or greater calculate your BMI
  • Body weight: 315 lbs or less
  • Have been told you have “pre-diabetes”, “borderline diabetes”

Study Duration

4 months


Earn up to $1000 for participation.

Study Contact

If you are interested in volunteering for STARCH, click here to screen online, call 225-763-3000, or email

If you think you may be eligible, please click the button below to screen online.


Please do not fill out this questionnaire for anyone other than yourself unless you are their legal guardian.
If you know someone who may be interested please direct them to the site or have them call us directly at 225-763-3000.


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