I have ms, are there certain vitamins i should take as well as my multivitamin?

Depends: You should ask your doctor to check a vit d level and get on vit d if needed to make your level normal. Also check with your doctor to see if you are anemic or in need of b vitamins. Except for vitamin d, most people who eat a basically healthy diet don't need any additional vitamins/minerals.

Not many, so far: Most focus on vit d and the ms pt with higher levels has fewer relapses and less MRI lesions. Some pts have b-12 deficiencies associated with ms, so might get that checked. Early info about vitamin a but still preliminary and unsubstantiated.