Mineral ContentSun-dried tomatoes serve as excellent sources of minerals, especially potassium and magnesium. Potassium helps your nerves communicate and regulates your electrolyte balance, while magnesium maintains healthy bone tissue and aids in energy production. A 1-cup serving of sun-dried tomatoes provides 105 milligrams of magnesium - 33 and 25 percent of the recommended daily intakes for women and men, respectively - and 1,850 milligrams of potassium, or 39 percent of the recommended daily intake. Consuming sun-dried tomatoes also boosts your intake of iron, manganese, copper and phosphorus.Vitamin ContentAdd sun-dried tomatoes to your diet as a source of vitamins, especially vitamin K and niacin. Vitamin K helps your body maintain mineralized bone tissue and plays an essential role in blood clot formation, while niacin supports your metabolism and contributes to healthy brain function. Women need 90 micrograms of vitamin K and 14 milligrams of niacin each day, while men need 125 micrograms of vitamin K and 16 milligrams of niacin. A 1-cup serving of sun-dried tomatoes provides 4.9 milligrams of niacin and 23 micrograms of vitamin K. They also contain moderate amounts of other vitamins, including C, A, B-5 and B-9.