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.
After successfully completing a transaction, you may be able to request your seller's contact information. Click the Advanced link at the top of the eBay home page. Click the Find contact information link in the Members section on the left side of the page. Enter the seller's user ID and item number.