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.
Whatever the issue, you're going to want to get in touch with Amazon's customer service department. To contact Amazon by phone: The easiest way to contact Amazon's customer service department is by using their toll-free phone number at 1-888-280-4331. If you need the personal touch, feel free to call and speak to a representative. If you want a more efficient way to solve your problem, use Amazonâs guided contact process. To contact Amazon using their guided customer service process: 1  Sign into your Amazon account and click Help on the right menu. 2  Click Contact Us. 3  Enter the details of your problem. 4  Choose from Email, Phone, or Chat as a method of resolving your issue.