Tuna
Not only is tuna simple and quick to make up for a sandwich or salad, it is rich in omega-3 fatty acids, protein, and other trace minerals present only in animal protein. For instance, tuna has the full spectrum of B vitamins to boost energy and immunity. The key mineral, though, would be selenium. Tuna has nearly 200% of the dietary requirement in a single serving. You can get creative with adding tuna to meals, such as placing it in wraps, sandwiches, salads, pasta dishes, or even throwing a tuna steak on the grill in the summertime.
If your child[ren] avoids tuna, you can try mushrooms, another rich source of selenium.
