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.
In order to sell books on Amazon, you will need to create a seller account. From there, you can either sell and ship the books yourself or allow Amazon to ship the books through its Fulfillment by Amazon program.his listing can be converted to an FBA listing. 1  On your Seller Central page, select Manage Inventory under the Inventory section of your account. 2  Select the book you want to convert. 3  Go to the Actions pull-down menu on the page. 4  Amazon should take you to the conversion page next.