what is the addictive substance in tobacco products Most products, including e-cigarettes, contain nicotine, a chemical that can harm heart, brain and whole body. As with other products, using a nicotine product builds tolerance, leading to more SJC Public Health Services |
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Determination of appearance index of mice During the experiment, the general appearances of the animals were observed and their body weights were monitored every 10 days
Subjects were categorized according to tobacco use at baseline and at follow-up, resulting in ten mutually exclusive groups
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