He likely handles it with a production medical and food-safety team, but reports about Beast Games say the early filming setup did not always properly account for allergies, medications, or dietary restrictions. Contestants later complained that meals were limited and not tailored to allergies, while MrBeast’s team said some of the problems were due to miscommunication and that contestants were fed three meals a day.

Why a “city” can still work

A TV “city” is usually a controlled set, not a normal town, so the production can decide what food, housing, and health support is available. In theory, that means they can stock separate meals, label ingredients, and set aside medication handling rules for people with allergies. In practice, the reports around Beast Games suggest that this planning was either uneven or not followed well during the early rounds.

Allergy concern

The big issue is not the existence of the city itself, but whether the crew uses proper safeguards. Those should include ingredient lists, special meal options, medical check-ins, and a clear system for meds and emergency response. Reported complaints said some contestants with allergies were not accommodated properly, which is exactly the kind of thing a large production is supposed to prevent.

What the reports suggest

  • The contestants were housed and filmed in a constructed “city” set.
  • Some participants said food was scarce or not allergy-aware.
  • MrBeast’s side said some complaints were exaggerated or caused by miscommunication, and that a small fraction of participants raised issues.
  • The controversy became part of a wider safety criticism around the show.

Simple version

So the short answer is: they should be able to let people sleep there safely if the production is organized properly, but the public reporting on Beast Games says the allergy and medical handling was controversial and may not have been managed well in every case.

TL;DR: A fake city can be run safely for contestants, but only if the producers tightly control food, meds, and emergency planning; reports say Beast Games got criticized for not doing that consistently.