Studies suggest that aromatic candles emit more elements than non-scented candles, and these emissions have the potential to be harmful.
Most experts agree that the likelihood of being harmed is possible, but uncommon.
Bailey Engineering Corp. Florida, conducted studies on soot emission after homeowners found unexplained soot deposits in their dwellings. These findings have prompted some US residents to file a suit under California's Proposition 65, which states that products containing certain potentially harmful toxic substances should be appropriately Labeled. The company also found that some candlewick cores were made of lead wires. Another study conducted by David Krause, of Indoor Air Solutions, found that aromatic candles released higher levels of potentially harmful emissions. Krause, who studied emissions from 91 candles for his thesis at the University of South Florida, found that a higher percentage of scented candles emitted soot, when compared to non-scented candles.