Is Nitrogen safe?

Absolutely!  Nitrogen is a non-toxic, natural gas that is odorless, non-flammable and completely safe.  However, breathing pure nitrogen could cause fainting, due to the lack of oxygen.  To prevent this, the cryosauna is designed

to keep the individual's head above the chamber, and individuals are instructed to breathe up or hold their breath during the treatment if the nitrogen approaches their face.

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