Don't we, as human beings, exhale formaldehyde as part of our normal biological processes?
And wasn't the formaldehyde that was exhaled by vapers not shown to be much more than normal human beings?
If I am wrong about that I would love some clarification.
But that is the conclusion I am sitting on after reading some threads on this matter.
The vapor used in studies... is it vapor exhaled or vapor straight out of the device?
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