While this is true for anyone, poor nutrition in people with MS can result in an overwhelming feeling of fatigue. Improving your diet and getting key vitamins and nutrients for energy can fight off that groggy feeling well. What types of food should you eat? Make sure you're getting lots of protein, whole grains, and fruits and vegetables. Healthy fats and Vitamin D are also crucial. Of course, you can go over your personalized diet with your doctor or nutritionist to best fight off the feeling of fatigue.