I have also heard that the smoke that comes from many candles isn't so healthy. I have a chronic cough and my father always thought it had to do with my love of burning candles. You might want to look into soy candles. I also belong to an international wellness company that sells environmentally safe candles, cleansers, and hygiene. I have three kids in the house so my husband and I are starting to look into how harmful everyday products can be. If you like more info into what we have found out, please drop us a line. Our website is www.healthyfamilyforme.com. The research is out there we just have to educate ourselves.