Prevention of Inflammatory Bowel Diseases in Persons at Risk The PIONIR (Preventing IBD Onset in Individuals at Risk) Trial

The goal of this study is to explore in a cross over randomized controlled trial, the ability of the Tasty\&Healthy dietary intervention (NCT04239248) to alter the parameters associated with future risk of developing Chron's disease (CD) using First Degree Relatives of patients with Crohn's disease, including subjects identified in the Genetic Environmental Microbiome (GEM) Study as having a high-risk score. Specifically, the investigators aim to determine if the Tasty\&Healthy dietary intervention can decrease the overall GEM Risk Score (GRS) and/or to alter the individual biological parameters that contribute to this score. The investigators hypothesize that the Tasty\&Healthy dietary approach will alter the risk of CD as reflected by a decrease in the GRS.