3. Tuna fish
While we are talking about fish, tuna is also a great source of vitamin D. A single can of tuna offers around 458 IU of vitamin D, which is around 77 percent of the recommended daily intake. That means that by eating tuna on a regular basis, you can avoid the negative effects that are associated with a vitamin D deficiency.
In addition to offering a lot of vitamin D, tuna is also a great source of several other vital nutrients. Tuna contains protein, omega-3 fatty acids, omega-6 fatty acids, vitamin B12, niacin, potassium, magnesium, selenium, vitamin B6, riboflavin, iron, phosphorous, and so much more! Tuna can effectively help to improve the health of your heart, strengthen your muscles and bones, reduce your blood pressure, boost your immune system, increase your energy levels, and even help you manage your weight. Enjoy tuna on a salad or a sandwich.