Genetic factor -My dad had MS, my brother and his daughter have MS and I have MS. I am of Swedish/Norwegian heritage also. Paleo diet has helped me - the environmental factor. No gluten, sugar, legumes and no dairy. I eat Tree nuts, berries, fruits, veggies heavy on the greens, wild meat and fish and of course Vitamin D is important. I eat rice in small quantites and sweet potatoes for my starch fix. Take sups like Vit D3, B12, Fish and flax seed oil, grapeseed extract and daily baby aspirin. Med free and in remission but keeping fingers crossed.