After having MS for 25+ years I can honestly say that a balanced diet full of whole grains, fruits and vegetables, some kind of daily exercise (whether it be 5 minutes/day of walking or a marathon!) and handling stress as best as you can is the best NATURAL method to treat MS.
About 30 years ago my doctor, who was wiser than wise (!) gave me a list of vitamins I should take on a daily basis (when I was beginning to feel some "weird" symptoms) and they included CoQ10 (taken with a fatty acid), Vitamin D, calcium, a multivitamin & Vitamin E. I've been taking them ever since.
All of the above work for me in addition to traditional meds like Copaxone.
I hope this helps you to see what others do for themselves. As you know, everyone's MS is different, so we all have to find what works best of ourselves.
I can't advise you of ways to help treat your disease, but I can share with you what my doctors have recommended for me (and for many of their patients). My rheumatologist recommends a diet rich in fish and vegetables, and low in red meat. My neurologist recommends that I take a certain amount of vitamin D based on the levels found in my blood. (You would need to be tested to know what was appropriate for your needs.) But both of these doctors also recommend that I continue with my pharmaceutical therapies to treat my diseases. The combination of approaches is important.
I have found that eating a lot of baked fish and boiled eggs to be helpful. Also, green peas, collards and turnups (I'm southern), and milk. I have heard and read things about B Vitamins and Vitamin D3 being good for us as well. Always run things by your doctor, but I feel better since I have been eating these things. I hope it helps.