Multiple sclerosis attacks the nervous system and prevents proper muscle control, but it can be exacerbated by a weakened body and frail bones. Therefore, increasing your calcium intake is essential if you want to delay the worst MS symptoms and extend the period of this disorder with a normal quality of life. Calcium is essential for boosting bone mineral density, so adding calcium-rich foods to your diet is a must. Some of the best foods for high calcium content include spinach, yogurt, cheese, green beans, fish and tofu.