Partial-enteral Nutrition Protocol for Crohn's Disease

Inclusion Criteria: * Moderate to severe CD as defined by physician and starting new biologic therapy * Able and willing to complete the study procedures * Age \> 18 * Able to comply with study measures in the opinion of the investigator Exclusion Criteria: * Diagnosis of short bowel syndrome * Presence of ileostomy or colostomy * Presence of a pacemaker or any electronic implantable device * Use of pre or probiotic supplements within 14 days of randomization * High risk for development of refeeding syndrome * In the opinion of the investigator would not complete the study procedures * Patients with active implanted medical devices, e.g. cardiac pacemakers, defibrillators or patients connected to electronic life support devices * Pregnant Patients: while the use of bioimpedance technology in pregnant patients has been shown to have no adverse effects, it has yet to be clinically validated for use with that population group * Serious, concomitant illness that, in the opinion of the investigator would interfere with evaluation of safety or efficacy, or put the participant at risk of harm from study participation