### Question
How does TOBACCO PRODUCTS define smoke constituent?


### Answer
Under *21 U.S.C. § 387*, **smoke constituent** is defined as:

> any chemical or chemical compound in mainstream or sidestream tobacco smoke that either transfers from any component of the cigarette to the smoke or that is formed by the combustion or heating of tobacco, additives, or other component of the tobacco product

#### Citation:
  - *21 U.S.C. § 387*
  - Heading: **CHAPTER 9-FEDERAL FOOD, DRUG, AND COSMETIC ACT > SUBCHAPTER IX-TOBACCO PRODUCTS**

