Like tobacco, any smoke contains toxins that are known to be hazardous to the respiratory system. These toxins are essentially a byproduct of combustion.
Vaporizers are designed to let users inhale active ingredients of herbal extracts while avoiding harmful smoke toxins. They do so by heating the extracted oils to a temperature just below the point of combustion where smoke is produced. At this point, active elements are emitted with little or none of the carcinogenic tars and noxious gases found in smoke.