Very few foods naturally have vitamin D. Fortified foods provide most of the vitamin D in American diets. 1  Fatty fish such as salmon, tuna, and mackerel are among the best sources.  Beef liver, cheese, and egg yolks provide small amounts.
Note: To contact a Seller requesting an invoice for an item Fulfilled by Amazon: 1  Go to Your Orders. 2  Click on the Seller's name, located below the item title. 3  Click on Contact Seller in More Information. 4  Fill out the information request form.
At the top of the page mouse over the My eBay option and in the menu that appears click Summary. Step # 2 -- Contacting the Seller. On the page that loads find the item that you just bought and find the More actions link next to it. Click on this and in the menu that appears click Contact seller.