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.
How to Contact Amazon. You can use the main Amazon contact number on 0800 496 1081 to get straight through to Amazon customer service. There are no limits as to what one can get assistance with when speaking with the Amazon customer service department. Help is available at all hours via phone, email, and on social media.