A heated tobacco product (HTP) is a tobacco product that heats the tobacco at a lower temperature than conventional cigarettes. These products contain nicotine, which is a highly addictive chemical. The heat generates an aerosol or smoke to be inhaled from the tobacco, which contains nicotine and other chemicals. HTPs may also contain additives not found in tobacco, including flavoring chemicals. HTPs generally heat tobacco to temperatures under 600 °C (1100 °F), a lower temperature than conventional cigarettes. HTPs use embedded or external heat sources, heated sealed chambers, or product-specific customized cigarettes. Whereas e-cigarettes are electronic devices that vaporize a liquid containing nicotine, HTPs usually use tobacco in leaf or some other solid form, although there are some