some of the key nutrient deficits seen in ms patients have strong links to anxiety. low normal zinc and low normal magnesium come to mind as low hanging fruit. if you would like research links just say.
there are a variety of ways you can address these and i'll go from lowest to highest capacity here:
i) analyze intakes (food, fluids, drugs, supplements - including combinations and timing) to look for gaps and conflicts where zinc and magnesium inputs and absorption are concerned.
ii) redistribute intakes to optimize nutrient retention. common recommendations such as food avoidance related to dairy, sugar, gluten etc tie in here
iii) intensify intake of nutrient dense foods rich in zinc and magnesium
iv) purchase and use high quality zinc and magnesium products (ensure that any zinc products are balanced with copper, and ensure the magnesium is bioavailable - magnesium glycinate is a good one)
v) have your levels tested to ensure that your regimen is achieving (and not exceeding) serum targets. be aware that healthy levels are distinct from 'normal'. results interpretation in the mainstream is often faulty.