Trial Parameters
Brief Summary
Dietary fiber has been shown to have beneficial effects on human health through its impact on microbes present in the gut. However, these effects can vary between individuals, and everyone may not reap the same health benefits by eating the same sources of fiber. Factors predicting how an individual's gut microbes as well as the beneficial metabolites produced by these microbes change in response to different sources of fiber would be helpful in developing precision nutrition approaches that maximize the benefits of dietary fiber. The objective of this study is to evaluate candidate predictors of gut microbiota response to fiber sources from either whole grains or fruits and vegetables.
Eligibility Criteria
Inclusion Criteria: * Age is between 21-50 years * BMI is between 25-30. You can check your BMI here: https://www.cdc.gov/bmi/adult-calculator/index.html * Must be able to have height, weight, waist, and hip circumference, and body composition measured during the study * Must be able to provide saliva samples. * Must be able to provide a phone number and email address at which the study investigators can contact for study-related matters. * Must be able to increase dietary fiber intake to the recommended level following the instructions on the USDA MyPlate website: https://www.myplate.gov/myplate-plan * Must be able to provide food records of everything consumed (food, beverage, and supplements) on one weekday and one weekend day (example Tuesday, Saturday) every week during the study. This will be done using an online survey. * Must be able to provide 10 stool samples over 11 weeks of the study duration. 18) Must have stable weight (within ±3% of usual body weight) for the last two mo