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.
What is Amazon's phone number? A: For general assistance, users inside the United States can reach Amazon.com customer service representatives at 1-888-280-4331, and international users can call 1-206-266-2992. Contact with the company can also be made via email or live chat on the official website.