Eat foods high in folates and vitamin B12
Make sure you are getting enough vitamin B12 and folates from your diet. Both are important to your health, but more so if you have low blood pressure. Deficiency in either folates or vitamin B12 can lead to anemia [5]. This anemia can cause your blood pressure to fall and induce fatigue.
Foods rich in folates you can add to your diet include beans, eggs, lentils, asparagus, beets, nuts, citrus fruits, liver, and wheat germ. You can get vitamin B12 from foods fortified with vitamin B12, eggs, nutritional yeast, and animal meat.