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    • For me, I'm wavering between a few items:

      Watermelon - Every time I eat a watermelon, I think to myself, "if I had this on a desert island, I'd be the happiest person on earth." It's somewhat nutritious, or hydrating at least, and it's delicious. But it's not very versatile. I can't really use it to make anything else.

      Potato - Potatoes are pretty versatile. I could make fries. I could make hash browns. I could mash them. I could use it to thicken broth or soup.

      Avocado - It is nutritious, versatile, and pretty delicious. It has a lot of fat, which is probably something I'd be missing in my desert island diet. I could spread it on things, or eat it straight out of the husk. I could make desert island guacamole!

      Egg (chicken) - I love eggs. I could hard boil them. I could soft boil them. I could use them as an emulsifier in cooking. I could bake things (kind of)! They are incredibly nutrient dense and I could probably live off them for a long time.

      I think I'm choosing eggs. For me, eggs satisfy all 3 considerations: they are nutritious, versatile, and delicious.

    • Mmmm, potatoes for me. Nothing against eggs, just no likey. It's strange to think, but there's an actual scientific satiety test to measure how satisfied we get after a certain number of calories and potatoes are #1 (if you don't load them with butter or sour cream or fry them in oil).

      There are whole populations who survived on potatoes for long periods and were fine. I eat baked purple potatoes like they were apples and I like them and they satisfy. The Okinawans, who are the longest-lived people in the world, get 70% of their calories from purple sweet potatoes.

    • Seafood is a great source of protein, fat, and many vitamins, so catching fish and shellfish would get you off to a pretty good start. But one of my main concerns would be not dying of scurvy, and ocean seafood isn't a very good source of vitamin C.

      Coconuts have some vitamin C, but not a ton, so assuming there are coconut trees on the island, that's an option. But you'd need to consume a lot of coconut milk and meat to stay healthy. I'm not crazy about coconut, so I think my one airdropped food item would have to solve the vitamin C problem.

      The good news is that potatoes are a great source of vitamin C! So I'm with @NikkyJ on this one.

      Science says a human couldn't stay healthy eating only potatoes for an extended period, but I think a mixed diet of seafood and potatoes could sustain a human indefinitely, and would be pretty tasty too.

      If you really had to survive indefinitely eating only a single thing, there is some precedent for humans surviving by eating only whales, but whales aren't exactly easy prey. 🐳