In a 2001 study,
[18] researchers found that "it is possible to vaporize medically active THC by heating marijuana to a temperature short of the point of combustion, thereby eliminating or substantially reducing harmful smoke toxins that are normally present in marijuana smoke." The unit produced THC at a temperature of 185 °C (365 °F), while eliminating three measured combustion products,
benzene,
toluene and
naphthalene.
Carbon monoxide and smoke
tars were also reduced, but not quantified.