Don’t ask. Commercial activity in Antarctica is controlled by the Antarctica Commission on which sit representatives of each of the 12 signatory nations of the Antarctic Treaty of 1959. Most commercial activity is banned although some of the 12 nations, each of which has a historic claim of territory in Antarctica (but has suspended those claims for as long as the treaty remains in force) do sell stamps (such as the Ross Island Dependency stamps produced by new Zealand), post cards and such. As far as I know, no food products are produced and unless, like certain great whales, you are partial to krill (small, shrimp-like sea creatures) or, perhaps, seal or skua (a large seagull) meat, it’s hard to know what could be produced since virtually nothing grows there on land and the animal life (seals, penguins mostly) there depends on the sea for its food supply.
BT (who spent the Antarctic winter of 1976-77 at McMurdo Station, Antarctica after declining the hospitality of the Russians at Vostok Station where the world record cold temperature was recorded–at that time, -127.6 degrees although I think a colder one has since been recorded)
PS–Although all the food eaten by us humans was imported from elsewhere while I was there, it was pretty darned good. It seems there was a large supply of frozen beef, purchased from the Australians largely as a sop to their beef industry, so we pretty much used beef fillet for everything–even ground it up for hamburger. And since most of the living quarters had their own kitchens so the occupants wouldn’t have to go out during blizzards to get to the central dining hall, all we amateur cooks got to use that prime beef in cooking competitions and large potluck suppers with each other.