Evaluation of the potential effects of ingredients added to cigarettes. Part 1: cigarette design, testing approach, and review of results.

A testing program was designed to evaluate the potential effects of 333 ingredients added to typical commercial blended test cigarettes on selected biological and chemical endpoints. Ingredients were incorporated into the test cigarettes as they are normally used in the manufacturing process. The studies performed included a bacterial mutagenicity screen (Ames assay), a mammalian cell cytotoxicity assay (neutral red uptake), determination of smoke chemical constituents, and a 90-day nose-only smoke inhalation study in rats.