Final visit* for intervention and control groups (1-2 hrs): Multiple Sclerosis Quality of Life-54 (MSQOL-54), Fatigue Severity Scale (FSS), Veterans Specific Activity Questionnaire (VSAQ), Medication, Vitamin, and Supplement Log, Food Log, Blood draw (vitamin B-1 (thiamine), vitamin B-9 (folate), vitamin B-12 (cobalamin), vitamin K, homocysteine, C-reactive protein), MS Functional Composite (MSFC) [Timed 25-Foot Walk (T25-FW), 9-Hole Peg Test (9-HPT), Paced Auditory Serial Addition Test (PASAT)], 6-minute walk, and Paced Visual Serial Addition Test (PVSAT). *End of participation for intervention group or cross-over (from control to 3-month intervention) for interested control group subjects.