The gas components exhaled by human body are: nitrogen accounting for 78%, oxygen accounting for 2 1%,

Rare gas accounts for 0.94%, carbon dioxide accounts for 0.03%,

Water vapor \ Other gases and impurities account for 0.03%.

Hydrogen is not toxic, but for the human body, inhaling too much hydrogen will cause hypoxia and suffocation, so there is no need to absorb hydrogen.