Here's some info given by Aroma Naturals, from the Greenspace website: For Aroma Naturals, candle fragrance is the key to making a healthy candle. "It's more important that the smell comes from essential oils than where the wax comes from," says owner Tina Rocca-Lundstrom. "There are more harmful toxins from synthetic fragrance than there are from food-grade paraffin." The Irvine, Calif.-based company's candles are made from three different wax varieties, including 100 percent vegetable wax, beeswax and paraffin." Currently, there are no government labeling requirements for candles, so manufacturers don't have to list ingredients. Retailers and consumers need to educate themselves about candle ingredients, Rocca-Lundstrom says. "They'll buy a soy candle to avoid petrochemicals, but then it has artificial fragrance with all kinds of harsh chemicals in it," she says. The company's two staff aromatherapists source essential oils from around the globe. The oils are tested with the waxes to make sure they are the right quality and burn properly before they are purchased.