What gaseous substances do humans emit? Other than CO₂ and Methane what other gases do humans produce or emit? For example, does skin decomposition, or aerobic respiration emit any special gases that people don't normally realize or know about. I ask because of a discovery I made during research is that while being poisonous to the central nervous system, methanol is a natural endogenous compound found in normal, healthy human individuals. One study found a mean of 4.5 ppm in the exhaled breath of the subjects. <

There are 100+ gas phase compounds that come from humans.

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Find other information about most of these families of compounds from wiki.

Full list of compounds is here

Methods and findings are here