Adults unable to consent, including non-English speakers.

Pregnant women because endoscopy is a risk factor. All patients of childbearing age undergo history as well as urine pregnancy test as a standard of care prior to undergoing endoscopy as the procedure is performed under anesthesia.

Prisoners.

Subjects with preexisting conditions (e.g., bleeding at the time of the procedure, suspected perforation during the standard-of-care procedure) will be excluded from the study at the time of the endoscopy.

Have a contraindication to endoscopy.

A history of surgery on the stomach or small intestine.

Type 1 diabetes (clinical diagnosis and/or positive glutamic acid decarboxylase antibodies).

Using weight loss medications.

Active malignancy within the last 5 years.

Dietary Sugar Absorptive Phenotype for Prediction of Weight Loss Outcome

What this study is about