The RE-EEN Smoothie Study is recruiting patients newly diagnosed with Crohn's Disease who are interested in using diet to help achieve disease remission. The purpose of the study is to evaluate the use of a whole-food based smoothie as Exclusive Enteral Nutrition for Crohn's Disease. In this study, participants will be randomly assigned to receive either a whole-food based smoothie, or formula as Exclusive Enteral Nutrition (EEN) therapy for Crohn's Disease. Participants will work closely with the study dietician to ensure that all of their nutritional needs are met during their participation in the study.

The goal of this study is to find out if we can develop a digital health approach that can increase sleep duration and improve growth outcomes in children.

Use of elexacaftor-texacaftor-ivacaftor ("ETI"), also known as Trikafta, is associated with weight gain in most people with cystic fibrosis (CF) who take this medication. However, some people gain more or less weight than is expected, and this can be either beneficial or problematic based on the individual's starting weight. The goal of this study is to compare factors between children and young adults with CF who have either had robust or minimal weight gain after one year of treatment with ETI.This observational study requires one study visit to CHOP that will last approximately 6 hours.