We don't add synthetics of any description to our candles, and make that clear in our marketing and on our packaging. The cheaper synthetic fragrances used widely in candles include a family of chemicals known as phthalates. Phthalates are now associated with cancer, asthma and even expanding waistlines, as the body stores fat to protect the organs from this insidious chemical. If you want to be sure your product doesn't contain nasties then examine the labelling. Most other 'natural' candle brands don't go this far.