6 healthy foods rich in vitamin D and easy ways to add them to your diet 6 healthy foods rich in vitamin D and easy ways to add them to your diet Ashley Lyles,Samantha CassettyMar 1, 2021, 01:48 IST Salmon is a good natural source of vitamin D.Allen G. / Shutterstock Foods highest in vitamin D include certain fish, like trout, but if you're vegetarian you can get your RDA from fortified food. Orange juice, milk, and cereal are popular foods fortified with vitamin D. Egg yolks and mushrooms are also a good vegetarian-friendly source of vitamin D. Vitamin D is an important vitamin that aids in the formation of strong bones among other health benefits. Even though it can be produced by the human body through sunlight exposure, about 40% of Americans are still deficient in this "sunshine vitamin."