What are sources of vitamin d?

Sun and foods: The flesh of fatty fish (such as salmon, tuna, and mackerel) and fish liver oils are among the best sources. Small amounts of vitamin d are found in beef liver, cheese, and egg yolks. Some mushrooms provide vitamin d2 in variable amounts. Ready-to-eat breakfast cereals often contain added vitamin d, as do some brands of orange juice, yogurt, margarine and other food products.

Sunlight, oily fish: 30 minutes of sun exposure produces about 15000 units of d3. Milk is generally fortified with d. Other natural sources of d are oily fish, such as cod, mackerel, and salmon. Many people take cod liver oil capsules to get their vitamin d.

Good question: Vitamin D is essential for bone health and has health other health benefits. Foods naturally rich in Vitamin D include oily fish such as salmon, halibut, cod, and herring, and mushrooms, free range chickens and eggs, pork or lean ham, dark green leafy vegetables, nuts, olives, lentils, beans, peas, and asparagus. Many dairy products and cereals are fortified with Vitamin D.

Sunlight,supplements: Sunlight is an important source of vitamin d along with other food like cod liver oil, salmon and other products with vitamin d added. See this video where explain a little more about it. http://otwithmd.com/vitamin-d/.