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.
Click the Ask a question link in the listing. On the Find answers page, choose the topic that best fits your question, and look for your question in any Q&A that appears. If you can't find your question, under Did we answer your questions?, select No, I want to contact the seller, and then click the Continue button.