A review of vitamins and dietary supplements by patients with Multiple Sclerosis found that the only "vitamin" with sufficient evidence to support supplementation was Vitamin D. Use of Vitamins and Dietary Supplements by Patients With Multiple Sclerosis: A Review https://jamanetwork.com/journals/jamaneurology/article-abstract/2679039 The article is paywalled, but Neurology Advisor has a summary of the supplements evaluated, and findings (spacing and bolding mine): https://www.neurologyadvisor.com/mu...or/vitamin-supplement-diet-ms/article/765464/
Association Between Vitamin D Supplementation, Multiple Sclerosis Relapse Still Unclear https://www.neurologyadvisor.com/cm...-to-vitamin-d-supplementation/article/769199/