Inclusion Criteria: adult women (≥ 18 years) with relapsing-remitting MS diagnosis; patients should follow a standardized immunomodulatory therapy or other disease-modifying therapy for at least 6 months; the patient should be able to walk without aid or work a full day in a position of average difficulty, as indicated by scores of Expanded Disability Status Scale (EDSS) < 4.5; patients with at least one lesion on brain MRI and/or at least one relapse in the past two years.  Exclusion Criteria: women with concomitant illness (e.g. malignancy, infections, malabsorption, heart-, liver- or renal failure); patients who changed treatment during or ≤ 6 months before the start or the trial; psychiatric conditions, alcoholism, drug addiction; using vitamin or mineral supplements during or ≤ 6 months prior to screening; following a vegan diet ≤ 5 years prior to screening or using weight loss medications; pregnant or lactating women.