Numerous studies have shown that candles made from soy, coconut or mixed wax rarely produce harmful substances when lit.
In fact, fragrances are derived from essential oils and have likely been approved by the International Fragrances Association (IFRA) for safe use of ingredients.
To minimise the amount of soot produced when using candles, keep them in a well-ventilated area! In addition, keep the wick trimmed to slightly more than 0.5cm and remove any debris in the wax pool frequently.