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Special Features


Gut Peptides and Body Composition after bariatric surgery

Principal Investigator:   Blandine Laferrere, MD
Co-Investigators:   James J. McGinty, MD, FACS: Ninan Koshy, MD, MBBS; John Harvey, MD
Time frame of study:   Ongoing
Time frame of participation:   2 or 3 half day visits- before your bariatric surgery, 1 month after your surgery, and 1year, 2 years, 3 years and 4 years after your surgery
Number of participants needed   Open
Location of Study:   New York Obesity Nutrition Research Center, Mount Sinai St. Luke's , 1111 Amsterdam Avenue at 114th Street,New York, NY 10025
Contact name, number and email  

Margaret Sala at 212.523.3503 or or Carolina Espinosa at 212.523.3581 or

Purpose of Study:
Learn about the benefits of gastric bypass and gastric banding surgery on body composition, the hormones that control insulin secretion and appetite, and your risk for diabetes. 

Participants will be examined during four study periods: before gastric banding or gastric bypass surgery, one month after surgery, and one year and two years after surgery. During each study period, participants will make three separate visits in the morning to the research center for various glucose challenge tests and body composition measurements. These visits will last for about four hours.

Criteria for Participation:
Planning to have weight loss surgery
Between 21 and 60 years old
Have type 2 diabetes
All ethnic groups welcome

Learn more about glucose, insulin and body composition changes after bariatric surgery and help understand why bariatric surgery may prevent and often “cure” diabetes. Partial compensation is provided to participants at the end of each study period. Total compensation for completing the study is up to $1,950.