Goji juice is sold in a number of online and brick-and mortar-outlets, not just at health food stores. The juice is made from Goji berries, which are reputed to have significant natural anti-aging properties, and is available from Amazon.com, Walmart and a number of health food stores.
Walmart and its affiliated website carries Goji juice produced by Dynamic Health Laboratories. It also offers the Pure Health Naturally Goji-cranberry juice drink. Amazon.com carries Dynamic Health Goji Gold juice, as well as the actual Goji berries. There are many websites that are dedicated solely to the sale of Goji juice, including GojiJuices.net.