In terms of the potential health ri

In terms of the potential health risks of inhaling vapor from using the
steam stones, nothing is currently known [2,39]. Whether the manufac-
turers' bold claims have any merit, smoking the stones still involves
using charcoal, which results in the inhalation of fine aerosol droplets
generated from the coated stones, toxic metals [40], carbon monoxide,
and PAHs [12,17,20,21,23]. In this manuscript, we studied the metal
content in both the steam stone coating and the traditional charcoal.
Then we collected steam stone and charcoal-generated smoke on filters
for metal concentration analysis. Lastly, we collected steam stone and
electronic charcoal-generated smoke to see if there was any change in
the metal content. We limit this study to the two original brands on
the market, plus five different flavors for each brand.