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.
Allow a reasonable amount of time to receive an item; remember that the seller needs time to process the transaction and ship the item. Step 2. Contact the seller and give him a few days to respond. Be sure to use eBay's messaging features instead of sending an email, since it's traceable by eBay if it's on their site. Related Reading: How to Bring More Interested Buyers to Your eBay Store. Step 3. Attempt to contact the seller two or three more times if you don't hear back the first time.