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.
Where to find it. 1  Customer service. 2  Find the information you need, or contact us. 3  Click Help & Contact at the top of most eBay pages.  Seller 1  Center. Get started with guided tours, interactive tutorials, and more.  Click Seller Information Center in the footer at the bottom of most eBay 1  pages. Discussion Boards.