Background:ConcernshavebeenexpressedaboutpotentialtoxicityofthesmokeproducedbytheburningofmoxaintraditionalChinesemedicine.Withtheadventofstrictanti-smokinglegislationintheUK,itwasdecidedtotestthevolatilesproducedbymoxibustionandcomparethemwithcurrentagreedsafeexposurelevels.