A comprehensive evaluation of the toxicology of cigarette ingredients: cocoa-derived ingredients.

Abstract:

CONTEXT:Cocoa-derived ingredients are used in cigarette tobacco. OBJECTIVE:A battery of tests was used to compare toxicity of mainstream smoke from experimental cigarettes containing different added levels of cocoa-derived ingredients. MATERIALS AND METHODS:Five cocoa-derived ingredients chocolate (CH), cocoa (COC), cocoa-grand prix black (CGPB), cocoa nibs tincture (CNT) and cocoa shells extract (CSE) were added individually to experimental cigarettes at three different levels. Smoke from each of the experimental cigarette types was evaluated using analytical chemistry; in vitro cytotoxicity and mutagenicity testing were performed for four of the five compounds. For CH, COC and CNT, 90-day smoke inhalation studies were performed with 6-week recovery periods. RESULTS:No consistent changes were found in the analytical chemistry results. Results of the cytotoxicity and mutagenicity were unaffected by any of the ingredients. Two of the three inhalation studies showed very few differences between the groups. The inhalation study with COC showed several increases in mean histopathology severity scores in groups exposed to different levels of COC, compared with the controls. These apparent effects of COC on histopathology lesion severity scores were only present in a single sex and none were dose-related, which is not consistent with a true increase in biological activity. Also there were effectively no differences in the patterns of recovery for any of the compounds. CONCLUSIONS:Even at high inclusion levels there was a lack of toxicological response in these COC derived ingredients.

journal_name

Inhal Toxicol

journal_title

Inhalation toxicology

authors

Coggins CR,Fisher MT,Smith DC,Oldham MJ

doi

10.3109/08958378.2010.542580

subject

Has Abstract

pub_date

2011-06-01 00:00:00

pages

70-83

eissn

0895-8378

issn

1091-7691

journal_volume

23 Suppl 1

pub_type

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