NCT03499509

Obesity Risk in African American Women is Determined by a Diet-by-phenotype Interaction

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 67 (actual)
• Sponsor: University of Alabama at Birmingham · Academic / Other
• Sex: Female
• Age: 19 Years – 65 Years
• Healthy volunteers: Accepted

Summary

The Scientific Premise of this study is that the high level of obesity displayed by African American (AA) women is due to the ability to secrete large amounts of insulin when sugary foods are consumed. When AA women eat a diet rich in starchy or sugary food (a "high-glycemic" diet that stimulates insulin secretion), the food that is eaten is stored as fat rather than being burned as fuel. The investigators previous research has suggested that AA women have an easier time losing weight and keeping it off when eating a low-glycemic diet. The proposed study will be the first randomized clinical trial to test the effect of high and low glycemic diets for weight loss and weight-loss-maintenance in obese AA women.

Conditions

• Diet Modification

Interventions

Type	Name	Description
OTHER	Low Glycemic Diet	Low Glycemic (LG) diet: The LG diet was made up of foods that do not stimulate insulin secretion and was composed of 20% CHO, 55% fat, and 25% protein. The diet emphasized complex over simple carbohydrates and allowed dairy products, fruits, and vegetables within allowance of the diet.
OTHER	High Glycemic Diet	High Glycemic (HG) diet: The HG diet aligned with the United States Department of Agriculture (USDA) guidelines (http://health.gov/dietaryguidelines/2015/guidelines/) and was composed of 55% CHO, 20% fat, and 25% protein. The diet emphasized complex over simple carbohydrates and allowed dairy products, fruits, and vegetables within allowance of the diet.

Timeline

• Start date: 2019-03-19
• Primary completion: 2024-04-30
• Completion: 2024-04-30
• First posted: 2018-04-17
• Last updated: 2025-05-18
• Results posted: 2025-05-18

Locations

1 site across 1 country: United States