my theory is there '"maybe" some potential harm to long term vaping.So is your Theory that using High Diketone e-liquids can Not Cause Long Term Damage to a Vaper's Lungs?
what form it would take is anybody's guess. it could come from the reaction
of the vapor to the very air we breathe. at any rate any harm if at all i
don't believe would be comparable or as severe and debilitating as the
illnesses blamed on smoking.

regards
mike