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2 In reference to the classic Indestructible Edible Trope, how long can an adult subsist on largely junk food? I realize that "largely" is vague, so feel free to clarify as desired to give a helpful answer (one way or the other). To motivate things: Imagine a world shortly after the apocalypse. Something very quickly resulted in the "depopulation" of most of the USA (or similar country). Best bet is a virulent plague with a 95% mortality rate. Because of how quickly it spread and killed people, those who survived the plague have basically found themselves in a "fairly" undisturbed world. For the purposes of this question that mainly means that grocery stores, gas stations, etc, are mostly still stocked with goods. Of course power goes out quickly, so anything that needs to be refri