Intermittent Fasting in Multiple Sclerosis

Inclusion Criteria: * Diagnosis of RRMS (2010 Mc Donald criteria). * EDSS \<6.0 and disease duration ≤ 15 years. * On an injectable therapy for MS, glatiramer acetate (GA) or beta-interferon (beta-IFN) for at least 3 months prior to the study and with no anticipated changes of the medication for the 12 week study duration. * Age ≥18 years. * BMI \> 22 and \< 35 kg/m2 with stable weight in the 3 months prior to screening. Exclusion Criteria: * History of any chronic disease process (excluding MS) that could interfere with interpretation of results. * Diagnosis in the past of an eating disorder (anorexia, bulimia, or binge eating). * Relapsing at the time of enrollment. * On corticosteroid treatment (oral or intravenous) in the past month. Nasal corticosteroid treatments are allowed. * Diagnosis of diabetes or at time of OGTT (fasting glucose \>126 mg/dl or \> 200 mg/dl at 2 hours with a load of 75 g of glucose * History of food allergies or food intolerance that would interfere with the study. * History of antibiotic treatment within the past 3 months prior to enrollment * Use of anticoagulant drugs (like Warfarin or Coumadin) that need to monitor their intake of vegetables containing high levels of vitamin K. * Currently on a special diet and not willing to stop at least one month prior to enrollment * Currently taking omega 3/fish oil supplements and not willing to stop administration one month prior to enrollment * Currently pregnant or plan to become pregnant within 6 months * Current tobacco or e-cigarette smoker